I also prefer the IBM eraser to a touchpad... but neither are as good as a mouse.
My MX1000 did take some time getting used too, especially since Logitech has a separate setup, so I need to juggle between windows mouse setup and the logitech mouse setup, and the damn shoulder buttons don't work in firefox on XP. Not that I like Firefox. I hate this piece of shit browser. I originally used it because I had to (baaad adware) but now I don't need to use it, but I use it anyway. I guess it's only because it hasn't crashed recently. Maybe Firefox 1.5 will fix it. None of the buttons, except for the main two, work in KDE 6.8, so once I get around to rebooting I'm going to have to download KDE 7.0 and recompile it. *sigh* At least the linux compiling works with SMP, so the X2 rips through it...
The mouse itself, I like. It took a few weeks to get the hang of it. I think I ended up completely disabling mouse acceleration. Previously it was way too jittery and sensitive and tended to miss buttons.