Very smooth unlike other similar magnetic rings, stylish and fun to play with. It's the best fidget so far...
Took me a little bit to figure out how to do anything with them, but once I did they've proven to be a very good way to channel and cope with anxiety.
They're good quality and while a part of me wants to drop a star for the magnets being too weak, (causing me to fling spinners across the room occasionally), I view this more as user error because a stronger magnet would just cause more drag when you move them around.
With practice I'm getting better. But especially with the tremors I have, I do have to be mindful when I'm using these. As much as I prefer to mindlessly stim with toys that I don't have to worry about losing things, the spinners offer a unique experience that I find well worth the extra effort.