I the pump to appear to have great engineering and design details however upon use I found rotating the barrel attachment to the valve stem difficult because of the finger force needed to rotate to a tight position (which my wife gave up on and went back to the old pump) and the barrel will not fit over a valve extender. So basically I can't use this pump. Looks nice sitting in the corner...
The mechanism for screwing onto the valve stem has worked really well on both presta and shrader. This pump is faster to inflate a tire than my old Joe Blow pump. I've been pleased with it.
I've been using the Schrader adapters to fill my road bike tires because I was disgusted with the friction type Presta floor pumps. It wasn't till I went over to my riding partners house and saw his new Lezyne floor pump and was impressed with the quality. I especially like how it threads onto the presta valves and the pressure release button on the side. I believe it should be the last floor pump I'll need to buy.
I like the screw on inflation head rather than the flip on, it takes a few more seconds but provides a secure connection, the relief valve also is nice to fine tune your pressure exactly, and the gauge reads easily.
The fit and finish seem nice, but pumping action seems just a bit spindly such that it almost feels like one could bend the pump arm if you don't go straight up and down. Overall, though, it is a nice pump.
If you are looking for a reasonable priced tire pump which does what it advertises to do, and you want a specific air pressure, this is the pump. It is as precise as the digital version with no needs to worry about batteries.