I bought this capo a while back because the earlier one I had was pretty bad. The quality on this capo is really great. The spring is very firm and even after a lot of usage still hasn't loosened at least noticeably. When I first took it out of the package, I actually had to use surprisingly lots of force to squeeze it. It is obviously easy to use, and once it clamps down on the neck it definitely stays there firmly. All in all, it does exactly what a capo is supposed to do, and does it perfectly. I haven't found any cons to it, and I honestly doubt I will.