Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best I've ever used, also the smelliest I've ever used

Easily the best I've ever used for wrist strengthening: not awkward like springs, and comfortable motion with consistent pressure.Two things make this a bit odd:1) They didn't print the weight on each piece. Using a marker, I took care of it quickly, but could easily see myself forgetting 30 is green, 40 is black, 50 is red. Might suggest that for convenience.2) They smell. I agree with the previous posts. I'm assuming it's the type of rubber or the process used to make the rubber- so far, cleaning agents have not removed the smell, though I hope it subsides.All in all, worth it for a good set of workout devices, and is a good tool for someone training to strengthen for both Martial Arts & Rock Climbing!