The key feature of this pump is that the pump head is connected to the main pump by a short section of rubber tubing. This lets you put the end of the pump on the ground after locking the head onto the tube valve. Then, you can use your body weight to do the pumping as with a floor pump, which is nice if you've got skimpy arms like me and need road tire pressure (100+ psi). A short, plastic foot swings down so you can use your foot to keep the bottom end of the pump from slipping as you pump. I'm a bit worried that this foot or its hinge will break, so I try to be careful not to stress it when I'm pumping on pavement, but it's held up fine after over a dozen uses. Finally, while the gauge doesn't seem to be super precise, it's definitely good enough to be confident that you've got the right amount of pressure 'til you get home to your floor pump. As a year-round, carless commuter, I'm happy I found this reliable, well-designed pump and have recommended it enthusiastically to other cycle-commuters.
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