Legit there isn't any complains or issues I can think of from my experience with it, it just works!
You can add momentum, control the speed, reverse, change cursor, and it's extremely light and simplistic, I just love it performs great.
Only legit problem I have with it is something out of the developer's hands, which is it doesn't work on firefox official pages like this one... or the option/addon pages, just cause I get so used to it because of how smooth it works, I actually feel like that's how you use pc, I forget sometimes that other pages such as a folder or chrome do not work like that lmao (it's not really an issue just worth pointing out)
Anyways thanks for this amazingly useful addon, here's your well deserved 5 stars <3