Have had it for about 2 weeks and its been used pretty much everyday by 2 people and its been great. Runs and feels like an expensive treadmill at a great price!

Hopefully it keeps running like this.

Get amazon delivery to your room of choice because it's HEAVY!

Assemble it with 2 people and will take about an hour...but assembly is totally doable by 1 young and 1 middle aged person. It may be too difficult due to the weight for elderly people alone to assemble.
Great treadmill. will update if it fails.

I love this treadmill. I've been using it for about 2 weeks. It handles well. It doesnt shake. It's not super loud. The hydraulic assist make folding/unfolding really easy. The directions were easy to follow for assembly. I enjoy the buttons on it for quickly jumping from one speed or incline to the next. I will say there are two things I wish were different. 1. I wish there was better volume control for the speakers. You can only use the volume buttons on the device that's connected to the treadmill and it never gets loud enough. Atleast for my liking. 2. The arms on the side are at an unfortunate length. They're short enough that when I'm walking, I tend to bash my fingers on them. If they were a little longer I dont think that would happen.

I have owned this treadmill for over three years. It still works, and I hardly do any maintenance to it. I occasionally add lubricant under the ban, but besides that, it's solid. I did receive it with a broken panel. However, I informed the manufacturer, and they gave me a small discount for my troubles. The panel pieces were just cosmetic and did not affect the great quality of the treadmill. I am a big guy, 6'2 close to 300, and it has not broken down.

I have had my Horizon T303 for several weeks now and I use it everyday. It is packed well and is not too difficult to assemble. Everything arrived in perfect shape (unlike myself!). Directions are okay. Read and follow carefully. Note that it is not able to.move through typical doorways, so make sure you assemble it where you will be using it! It is quite heavy and not so easy to move on the tiny wheels on the bottom. DO NOT try to slide the treadmill across carpet! I did this and it ruined the rubber levelers on the bottom of the treadmill (the rubber ripped right off because of the friction of the carpet). The Bluetooth is not great...that is to say that the speakers are subpar. They do not play very loudly. The fan on this unit is a joke. It barely makes any discernible breeze whatsoever! I use a box fan placed on the floor for cooling while working out. I have had trouble with the belt slipping (the belt surface itself seems very thin compared with other treadmills. Certainly way thinner than my previous Proform treadmill. I will have to see how it holds up. I paid just north of one K after taxes. I think it is more of an entry level treadmill than a pro unit. All in all, I think I got what I paid for.

I spent a lot of time researching purchasing a treadmill. I chose this one because of the 3.0 motor, the running deck size, and Horizon's good warranty (especially lifetime motor). I called Horizon before purchasing to make sure they were easy to reach should there be an issue.

Once the treadmill was delivered it was unusable. Horizon sent a replacement console and safety key, but that wasn't the issue. They sent a replacement cable and dispatched a contractor to come to my house and install the cable. IT WORKED!

After close to 3 weeks of sitting with an unusable treadmill, I can finally use it!

PROS:
For a tread around or slightly under 1K, it feels good and sturdy. I don't feel like I'm running on something dinky, it feels similar to the gym.

Powerful motor - 3.0 HP. I plan on running no more than 4 miles at a time on the tread and I'm not super speedy, but it's good to know that there is the power to run at faster paces and longer times.

Running deck: 60 inches long, I don't feel like I'm going to fall off.

Customer Service: Horizon was always easy to contact. Their reps are located in Wisconsin and are SUPER nice and helpful. The contractor that came to my house was also helpful. Despite there being an issue with my product, the silver lining was that I felt taken care of and know I won't be stranded if I encounter another issue down the road.

Quick jump incline and speed: I take treadmill classes on my kindle with the Peloton app and this is a good feature to have.

CONS:
I mean the item arrived defective. I would hope when springing 1K on a treadmill from a reputable brand, it would work.

No quick start workout summary: I usually run on the quick start option and when I end the workout it doesn't give me a summary of distance and pace. Not a deal-breaker, and maybe I'm doing it wrong, but if this is a feature I wish it would be simpler to figure out.

Directions/Manual not super clear.