I purchased this to replace my TST-507 system. The EEZ Tire TPMS system is a very noticeable upgrade. Here are a few things that make a huge difference. Note: my previous TPMS was purchased over eight years ago"¦so TST has probably upgraded their offering as well.

1) Color Display is easy to read and adjusts to ambient light conditions.
2) Displays real words in English when alerting to a problem vs tiny unrecognizable icons.
3) Super easy to program, with clear instructions.
4) optional Signal Booster comes with an ON/OFF switch inline on the supplied wiring harness for easy installation.
5) Sensors have replaceable batteries and they supply you with extra O-rings.
6) Sensors have brass quill depressors vs the old TST sensors which had plastic. The plastic wears faster and results in an unserviceable sensor which cost you a chunk to replace.

There are plenty of YouTube videos explaining the programming of you want a quick and easy rundown without having to read the manual..,but the manual does a very thorough job of explaining the setup and use. Great for a myriad of uses and configurations.

Addendum: As I stated below, I was very happy with this product,BUT, If you have a trailer longer than 20 feet,( mine is thirty) you should probably buy the repeater. I was on a long trip with my fifth wheel, and I started loosing the connection to the back passenger side wheels. I Replaced the batteries and that solved the issue, but only for a short time. Then I had the repeater delivered to one of the stops on my trip, then following the placement instructions, I wired it to the marker light hot wire and presto, every thing worked as it was supposed to. Just buy the repeater. What good is the product if it quits while you are traveling. ? I don't know if the warrantee on Amazon is any better, but it is easier to purchase from the manufacturer's web site than on amazon. I still think this is a more than worth while product. Oh, one more thing. DO NOT buy the longer (through input) wheel sensors/transmitters. They are too long and too fragile. Buy the shorter ones. It is not a big deal to have to remove the wheel transmitters if you need to put air in one tire. Chances are that will never happen. If a wheel is loosing air you likely have a tire issue and will need more than just air replacement. . End of Addendum: First let me say that eeztire seems very concerned about you having a good experience with their product. They include extra batteries tools and rubber seals with the unit. Every thing you need is in the kit. I purchased the flow thru sensors and was surprised that they do not weigh enough to cause my tires to need re-balancing. My tow vehicle is a Toyota Tundra with stock tires and rims. It appears that if I get too close to a curb, I could damage these flow through sensors. So if that is a concern and your willing to give up convenience when filling a tire, you might want the shorter sensors.. Some easy tips for an easy install: Make sure you follow the directions. Read and understand them before you start. They are detailed and simple to use and have a couple of options. I did all the settings before I installed the units on the vehicles. I think that might be teh easiest way. Make sure the locking screws on the sensors are backed out far enough so they do not contact the valve stems threads, before you want to lock the sensor. I read one reviewer that had an issue cross threading when installing the sensor, I suspect the screw was in too far. If when you start, you have a valve stem that does not have a cap on it, I recommend screwing a cap on first to clean the dirt out of the threads rather than using the more expensive sensor to clean the threads. My tires are all set at forty pounds. When I creating my settings I used the default minimum tire pressure warning of 35 pounds. When everything was completed the EEZTire system showed one tire was about 36 pounds so I made a mental note to put air in the tires.. The next morning when I got in my truck, the temerature had dropped from the previous day, and the alarm went off saying I had a low tire and the unit indicated which tire it was and indicated that the pressure was below 35 pounds. None of the other tires showed the pressures on the screen yet, but I was not even out my short drive way yet. Barley moving. People have mentioned that it takes a while before the tire pressure shows up. This is true. How ever, even though the tire pressure was not showing on the screen yet, I had a warning of a low tire. I'm very satisfied with that. since I knew I did not have a leak, and I recognized teh issue, I continued to drive, and since driving causes tires to warm slightly and for the air to expand, that 36 pound tire took very little time to be above the warning limit. Then , after all the tires had warmed up , I took the time to inflate all the exact same pressure. One or two pounds difference on each tire will not make a difference. After a few days of not extreme temperature changes , I find that the tire pressure changes as much as five pounds. I am extraordinarily happy with this device. Two years ago I had an expensive flat tire on my fifth wheel. I am confident this will prevent another. Almost forgot, I originally used the suction cup mount to fasten the monitor to the windshield and had it low on the dash. When I moved it up to barely below the rear-view mirror, it received the signal from the back wheels better and faster. If the suction up mount continues to hold after several months, , I will likely hard wire to the dome light so the wire does not have to drape down to the 12v cigarette socket.

We have a 2021 Thor Palazzo RV. It's on a Freightliner chassis and comes equipped with the Valor TPMS.

I don't trust the Valor TPMS, so I purchased and installed the EEZ TPMS on my RV's 6 tires, and our flat-towed Subaru Forester's 4 tires.

On the way back from a long trip the EEZ TPMS started beeping, alerting us that the passenger-side inner tag wheel was losing pressure. It gave us enough time to slow down, find a Flying J, and park in the parking lot.

Throughout this entire time the Valor TPMS listed all tires as "---". I guess it gave up somewhere along the trip and simply quit, not bothering to show any numbers for any of the RV's tires.

The EEZ TPMS saved our trip. What could have been a multi-thousand dollar fix ended up costing only $300. The air valves on both tag tires was rubbing against the outer rim and needed replaced.

EEZ TPMS is a worthy investment.

Super eez (easy) to install. . .and effective!! Had a road hazard tire issue a couple of hundred miles ago and the tire "expert" said I'd be fine to drive home. I figured I'd put the tpms on before the drive. I then realized that the t515 pass through sensors I purchased did not fit the front tires of my RV (2016 Coachmen Mirada 35ls). I called the company and asked what I could do. They immediately told me they'd send the smaller sensors for my front tires and suggested they send smaller sensors to replace the pass through I purchased for my yet to have tow vehicle. Here I was on the road and while I'm on the phone, they were already processing to send the replacement to my home. When I arrived home just a few days later, the sensors were already there. I put them all on in a jiffy. Once set, I received both audible and visual signals indicating I had one tire with low pressure... yup, the "suspect" tire DID in fact loose 14 pounds of pressure in just 250 miles. I verified the EEZ monitor with my tire gage - the sensor and monitor were right on! On Monday, I'm heading to my RV service provider for a new tire and rim - it's good to have road hazard coverage too, in addition to the EEZ TPMS. UPDATE: July 2019 - A couple of years ago, we got a new (to us) / used RV (2016 Berkshire XLT 43b) and simply swtiched the entire EEZ TPMS over. When we added a tow vehicle a few months ago, I purchased additional sensors and a toms singnal booster. Everything works great! Not only is the EEZ TPMS a super system, the EEZ customer service is second to none! They are the BEST - whether it's for advice, technical support, warranty support, or to order equipment or parts while on the road, they stand out. I will always be an EEZ supporter.

This unit worked well on a recent 1000 mile trip. The set up is fairly easy to set up. The main issue I had was not leaving enough difference between cold static tire pressure and operating pressure psi. This led to a multiple (annoying) alarm several times during the first day of the trip until I could change the setting from 110 psi to 120 psi. Unfortunately after I changed the upper alarm pressure to 120 psi (or thought I did), I was annoyed the next day of the journey with the same issue. (I missed by one lousy psi and the alarm would blare each time the tire increased from 110 psi to 111 psi in the original setting).
I then re-read the instructions to make sure I was doing this correctly but to no avail. The unit would not accept the reprogramming. So, reading the advertised 24/7 three year support statement furnished in the box, I called the "support line". I was greeted with something like:"This is so and so with EEZ and I'll be out of the country for 3 weeks with no cell service, but you can call "Donald" at blah blah...".
Great. I'm in Nowheresville with sketchy cell service looking for answers. I called "Donald" 3 times in 12 hours and got voicemail each time. Donald did however call me back (probably assuming I needed to talk with him). Luckily I was in cell range at the time. "Donald" had a very heavy Asian accent and was very difficult to understand. Cell phones didn't help the issue either. It turns out that if you reset the operational parameters of the unit, you must press the "set" button after it defaults to the temperature setting. This I DID do, BUT you must hold it down for 3-4 seconds until it beeps. Just so you know if you run into the same problem... After this was resolved, the unit worked great and I never had to worry about it afterwards.
Other tidbits:
1. Make sure you check the tire sensor units for air leaks after installation. I had one tire deflate prior to the trip and resolved it by tightening and checking the valve stem for leaks with soapy water.
2. The battery life is amazingly long.
3. If you buy the "anti-theft" sensors, you can discard them if you don't want to mess with the issue of using the anti-theft tool when adding air to the tires. The "anti-theft" jacket is 2 piece and simply unscrews like a mason jar and can be removed. Then just screw in the sensor to the valve stem without it.
4. The suction cup mount never moved or fell off the windshield in 14 days. I wish my Garmin unit was that good.
5. The "support" line may be a guy working out of his garage somewhere. If you can get past that, the unit itself seems reliable.
6. The monitor does not report tire pressure accurately. It reads about 5 psi lower than actual pressure. I have 6 tire gauges-3 of them are digital and 3 are analog. All read within 1 psi of the others. So either all 6 of my gauges are off or this unit reads "light". Keep this in mind when setting your high and low psi settings.