Ian Lauerwrote a review of Black Diamond Camalot C4 on May 4, 2017
Familiarity: I've put it through the wringer
I started my rack with Camalots years ago and keep coming back. In most ranges they are a superb pieces, and the massive range of the whole set means you can keep one cam type from splitters to off-widths cracks. I have been recently impressed though by the updated Master cams which appear in superior in many ways, but I simply won't be replacing all the BD's because of it. In sized larger than 4, check out the Technical Friends instead. They are wider and have better stability.
Black Diamond has major competition these days and needs to reinvent these (and I don't mean by charging outrageous prices for the UL's)