There are cheaper air pumps out there but I wanted a quality product that would last for years. I think that fits the picture quite well. It's big and heavy, but it screams quality. I use a small Makita air compressor, primarily for inflating tires. This inflator attaches well to most valve stems and stays in place. I had to hold it in place for some bike tires but it didn't make much of a difference. The inflation/deflation mechanism is easy to use and the sensor seems fairly accurate and easy to read. The average user probably won't need this, but I have several powerful cars, so I check tire pressures frequently. I'd still use a digital pickup for absolute accuracy, but it's good enough for off-track use. I also have a few bikes that need to be pumped up at least once a week and am tired of constantly hand pumping them to 60psi. It gets the job done in 10 seconds and that's for sure. It just means I have to put Schrader tubes or adapters on my prestas.