I chose one of these tires solely because the tire pressures have changed due to the cold weather in my area. I've only used it once (4 tires) and it seems to work as advertised. I like the fact that you can press and just walk away. The device is also a lot quieter than I thought it would be, although it's also quite slow. It took about 4-5 minutes to increase the pressure by 10psi. It has light and "works", but due to daylight I'm not sure how bright it really is. However, I can see that it's nice if you're in an emergency after dark. So in the end it does what it does and for the price you can't ask for more in my opinion. The only thing I noticed was that the pressure differed by about 2psi when I checked afterwards. However, this is not enough to cause serious concern. In terms of quality, it corresponds to the price range, is quite light and looks "good". One final note, the power cord is long enough to easily reach both tires on one side.