Being very used to another computer mouse that was quite small, therefore took me some time to get used to this one. Is still a little smaller mouse, but since I have small hands I wish it was a little smaller. The positive is that it does not cost the shirt that many computer mice do today.
Buttons: Very quiet, the only reason I changed the computer mouse and took this one.
Scroll: Pretty quiet too.
Side buttons: Could have been quieter, these are not as quiet as the other parts with the mouse.
Otherwise, I think the mouse responds well. Bought it a few months ago and uses the mouse mainly in the evenings and weekends, has not had to replace the battery so far.
Summing up, really a great computer mouse. Really wanted to give it 7/10 because I wanted it a little smaller, but it is not the computer mouse's fault, very good and therefore gets 9/10.