engine - 1:34 pm on Apr 11, 2012 (gmt 0)
I used to use a Logitech trackball, and yes, it did take getting used to. Once i'd got the hang of it i didn't want to give it up.
Sadly, one of the microswitches eventually failed. I never managed to find another trackball as good since then, so have resorted to a trusty wired mouse.