Look for what these are, they're fantastic, and I believe the class leader. Having said that, literally any brand of "real" dumbbell will always be better than any adjustable DB, so just know that going into anything in this class, however you're saving tons of money and space by going this route. The only performance ding i'll give it is that ours is a real booger to keep the plates in the carriage aligned properly when re-engaging the handles back in them for weight changes. I'll also say they're weathering a bit fast in our non-climate controlled garage gym in SETX. I would still buy these all over again, even though when we soon move gyms, I intend to complete my actual DB set from 50 currently up to 150; I don't think i'll be getting rid of these when we do! I'd like to also give Rep directly tons of credit for the pop pin replacement they sent us. Yeah, i'm sure insurance and liabilty came into play there, but it's still a really nice customer service touch and I'm going to try my damnedest to buy whatever my next piece is from them, purely as thanks back.
Performance
Value
Build Quality