I absolutely abhor moon clips. I have some of the rimz clips, but I haven't been able to try them to date.
Well, Rimz (I have some) aren't to be used as a measure of what steel moon clips are like. They're fine for playing around but being plastic aren't quite like the real thing.
Once I got my 625, the BMT mooner/demooer and some S&W and C&S clips, man they're the cat's meow. I've gotten my reloads down below 4 seconds. Sometime close to 3 on a good day. I don't come close to that on other guns with speed loaders.
The real problem with full moon clips, besides having to dump unshot rounds? You shoot too much. I can go through 100 rounds in minutes, because they're so easy to load.
But, I understand. Everyone has different likes and dis-likes. I feel that way about lasers, while others think they're the end-all be-all.