I have them and love them.. I would never go back to regular poles now because of the convenience. I found it annoying to struggle to put pole straps on correctly with thick gloves after getting off the lift, now I can just click-in and go. Steep and cheap has them from time to time; I got a pair from there for fifty or sixty bucks, and other retailers have them on sale from time to time.
I have the version with the yellow plastic tab that gets inserted into the pole- and as someone else mentioned they are quiet difficult to get them to release by pulling on them (I have not had them release in a fall.) The poles themselves are thinner (width-wise) than most aluminum poles I have seen and overall feel very sturdy.
As for putting them on, I just leave the strap on my gloves at all times and therefore I don't worry about losing them or undoing and redoing them all of the time.