It had/has major quality issues and bst handled the hole thing terribly. Doesn't mean that if you got a good one the mouse could not perform. It did much better than many (if not all) 3090 counterparts at the time.
I've been using it on and off since release, back to it again atm, and I can safely say that it beats a ZA13 and many more overpriced mice for me. a) shapewise and b) because the sensor does perform equally.