The reviews are kind of dated, wouldn't you say? The most recent is over 2 years old. The most negative reviews are over 4 years old. Products change over time, especially when there has been some negative feedback. Someone who says the hose doesn't stay on and/or that it let's air out is probably not using it correctly. Those things will happen if the head is not pushed down far enough.

I use one and have no problems with it. In fact, I have used various incarnations of this same pump since '99 when two people on my x-country tour had them. They got nearly daily use from multiple people. We used them not just to inflate after flats, but for regular pressure maintenance. The foot lever on one did eventually break off. Considering that it was well-worn to start with and the frequency of use, I don't think you could realistically expect more.