OK.... first use was fine (VERY noisy, but fine). I spent approximately 4 minutes inflating two bike tires... great. Now on to test #2, inflating a child's swimming pool... NOT fine. After 15 minutes of use (and barely any sign that there was air in the pool), the compressor shut off and now it will not start again. I removed the fuse and visited two hardware stores, only to find they do not stock that size. Next stop will be Home Depot, but that will have to wait until tomorrow. I just e-mailed Kensun for information, because I still don't know if I simply blew the glass fuse OR blew out the entire motor. Updates to follow.

UPDATE: 9/7/16: Received 2 e-mails and a phone call from Kensun offering a free replacement to a better model air compressor. As this is similar to the messages others on here have received, I pondered it for a while, but opted to just return the unit instead. I don't want to go through the hassle of shipping back and forth.

I noticed today, when looking for something to replace this item with, that it's now dramatically reduced from the price I paid. I'm not surprised; it was a total waste of money. I bought it to add air to my tires at home when the TPM warnings light up. A few psi will do it so I mistakenly thought, based in part on previous reviews, that this machine would do the job. The first time I used it, it did; sort of. It smoked like crazy, but it pumped air. I had an e-mail conversation with the manufacturer and they suggested it could be dust burning off on first use - hmm?? I kept it and used it for the second time today. Part-way through the job of topping up the tires to satisfy the TP monitor, it started smoking then shut down completely. Left it sit to cool off but it's dead.

Addendum, 24 hours later: The Kensun customer relations folks are certainly on the ball. I've received an e-mail and a voice message offering me a different (more expensive??) model at no cost. Often, how a company responds to complaints can offset a poor experience. I'm impressed by their efforts and have added an extra star to the rating in recognition. DS

Very disappointed. Purchased it to keep car tires properly inflated; for a car tire, this is NOT the best choice. First problem, the inflation rate is far too slow for any automotive tire. At first I thought the unit was not working; it made such a loud rattling noise while running and the featured psi gauge wasn't rising. Eventually I concluded it simply took a very long while to increase tire pressure, far longer than what I was accustomed to using other units. After increasing pressure by 5psi in all four car tires, I could see slight smoke coming from the unit. Second problem, the featured pressure gauge is not scaled well to read pressure from 0-40psi; the markings are too close together. Beyond 40psi, the scale is enlarged for better viewing making this gauge useful for reading higher psi, such as for a bicycle tire, but not for reading the psi range of a car tire. In summary, consider this unit if you only need to inflate bicycle tires or perhaps other small items. The fact that it plugs into household current is nice and I like the way it clips to the valve stem on the tire. But purchase something else to inflate car tires.

These people stand behind their product. Well made durable compressor. Not super fast but can inflate large tires if you have the patience. 12v or 110v is a very nice option. No auto stop. But, I had a hose come off. Instead of asking me to send it in or try to fix it, they just sent me a new one free, no postage, no questions asked!!!!
Now, I have to revise my rating. The same thing happened with the replacement compressor as with the first one. The inflator hose came off in side the unit. I tried taking it apart to fix it but not made to be repaired. Also it overheated and stopped working more and more often. But without the inflation hose, it's useless.
Good design..poor quality

Needed to put air in my tires. When we had a bit of a cold snap the Low Tire Pressure light lit up on my car's dash. Tried using the coin operated air compressor at the gas station to inflate the tires, but that didn't work. I decide to check out tire inflator air compressors here on Amazon. After checking out many models available I decided to purchase this one. I like that it can be used with a regular home outlet and with the 12v car plug. Also liked that it looked like it was solidly built, based on the photos and the other reviews on here. Also liked that it can be used for bike tires. It came in a black storage bag, and included the 110 v home wire and the 12 V car plug. Has a separate on/off switch for each power source. Also came with other attachments to fill up balls and other inflatables. Directions are minimal, printed on a small piece of paper. Don't know much about cars or specs on tires or air compressors so i just wanted something that would be easy to use and decent value.

Basically, after checking the tire pressure needed, I lugged the unit in and connected it to the tire. Turned it on and noticed a few things. It's rather loud. It vibrates a lot so that when you're looking at the gauge the needle vibrates as well. . Topped off the tires in a few minutes and used a tire pressure gauge to check the tire pressure.

Was a good deal for the price. Handy to have in the car when needed.