I used a Logitech while waiting for the Kensington. For me, not even close. The big ball makes cursor control easy. But that's why there are so many different choices available - something for everyone.

Maybe my house is located on Indian burial grounds. Something always goes wrong with my computer, and that's been the case since my first dual 360K floppy, 256K RAM IBM PC. Fortunately, from my bbs sysoping days, I made friends who take care of the fixes and upgrades for me over the years. One of them bought the Exabyte on ebay., and installed it - right now, he has it, and is trying to fix it while lending me his drive.