I had older thumb grip covered which I loved - but unfortunately with time, they became a bit loose and would rotate which just isn't acceptable. Ended up purchasing this as I figured even if some were trash, there's enough here I could probably find a good pair.
Turns out, I got lots of good pairs. They all seem to be decent quality, and I haven't had an issue with any of them yet. Great product over all. Provides adaquate grip, although I will admit that the grips could be raised a bit more.
Only issue is because of how tight they fit, they can be a bit difficult to apply every now and then. But overall, great product.