I've owned the PowerBlock Elite USA dumbbells since I was in college (bought them as an "almost got a 4.0" gift to myself, hehe). They've held up near-perfectly, with only tiny cosmetic wear, despite lots of use and being transported many times (I always bring them when I house/pet sit). I know it's one of their main and most advertised features, but how easy they are to transport and store is worth the price on it's own. A nifty bonus feature I've never seen anyone talk about is that you can flip the dumbbells upside-down and hold the adder weight tubes, which is real convenient for certain movements or if you wanna quickly halve the effective weight (e.g. like drop set curls). After about eight years of good use, I'd genuinely give them a 9.9/10.