They (I have 3 different Lezyne pumps) pump up superbly well.
Screwing them onto the valve is just a bit of a hassle though – especially when you get those presta valves that stick and you have to unscrew it and back on again… And those times it takes the valve core with it..!
Sounds completely shite tbh! But even once you deal with all of that (the ABS2 chuck is better than the old one btw), my overdrive was slower to inflate tyres, and less good for tubeless. Joe Blow Mountain by comparison is rattly and cheap feeling, but half the price and better at the job.
What’s really odd is that Lezyne keep reinventing their screw on chuck, and each time it does get better, the current one does more or less work as long as you use it right… But they also make a perfectly good dual valve, flip lever head, just like everyone else does and has done for decades- they just don’t fit it to their nicer pumps, I assume because it’s not pretty enough.