Rimz are great for the range, but nothing else. The cartridges will pop out if you drop 'em.
I just bought a bulk load from moonclips.com. I had some of the Wilson ones too.
Honestly, it's a little piece of stamped steel. Not a whole lot to get wrong.
They make extra-expensive stainless "match grade" ones, but you'd have a hard time convincing me that that's not just a bunch of marketing hooey. Most 625s will be crazy accurate regardless of which clip you use.