This capo (not specifically this one, but this model) is what I've been using more or less since I started playing guitar. I've tried others, but the ease of use with kyser capos make them superior in my book.
Depends on what you play of course, but today I use one of these and a kyser drop D capo together and being able to move them around quickly is great. They also last for a long time, which is a plus. Longer than some more expensive brands.
It's ease of use combined with quality and price is really what makes it different from others.
If there's one thing I'd say about it non-positive, which isn't really a negative either, is that adjusting tension of the capo can be hard. It's easier on the drop D, and I don't know why. Doesn't really matter though since it's more of a "set it and forget it" kind of thing.
TL;DR: Great capo. Quality, ease of use, price. Adjusting the tension though, can be a bit hit and miss from capo to capo.