First of all, only 8 buttons are programmable, not all 9, one of which is the scroll wheel. Having experience with serious companies like Logitech and Razer, finding out how to download the application for controlling and programming the mouse is disappointing. Of course, compared to the disappointment of the menu after downloading it, it's nothing. Good luck trying to make a macro work. I haven't managed to do it yet.
I'll put aside the fact that I haven't been able to make it work wirelessly or with Bluetooth because this particular one might have a problem.
Ergonomically, I don't find the position and feel of the side buttons convenient.
The irony is that initially it was sold for €99.