I used them for martial arts session: the item is great and exactly as described, with 2lbs weights per side, with a great thumb lock design and secure velco (they've only once came appart on their own and I was wearing it on my ankle at the time and practicing kicks.)
Didn't get a five star from me just because they're not perfect for me personally. I have very slender wrists and even with the thumb hole they still manage to slide around unless I grab the edge of the hem on my fingers while making a fist. So for things like throwing punches, blocks or any movement where the hands are moving rapidly, it can get a bit tiresome. For regular exercise such as running, weightlifting, etc. they're much more obedient.
Like with any wrap weight, the best part is taking them off after a long time wearing them: you just feel so light!