Well after studying a few of these I decided on this one for the features. Since it's daylight saving time, I knew I would use it often. The digital display seems very accurate. I've used it to fill soccer balls, basketballs, and bike tires. It worked great and I love the fact that it's compact, I can leave it in my trunk. The only thing that would be a nice addition would be the ability to plug it into your home's electrical grid. But other than that it's a good product and good value for money.