I have used them for years, and almost exclusively for the past three or so. I own about 8 (3 in active use, ~2 only useful for parts). Kensington Expert Mous

I have used them for years, and almost exclusively for the past three or so. I own about 8 (3 in active use, ~2 only useful for parts). Kensington Expert Mouse (USB, not wireless) is my main model - I use three of them daily (2 at home, 1 at work).