I've been happily using the Wireless Mighty Mouse for about 6 months now.
Even with my lack of experience on the subject, something which i will definitely say is with TRACKBALL MOUSES ALWAYS MAKE SURE YOU TRY BEFORE YOU BUY.. i cannot echoe duff-e's words strongly enough///
Just out of curiosity, no rudeness intended or sarcasm, but what is your need for a trackball? What can it do that a normal mouse can't?
If you're planting your arm on your desk and cranking your wrist to move your mouse all the time then yes, that probably would hurt. If you move with your whole arm, then you won't have that problem.normal mouse = pain in wrist = tension = RSI = disabled
trackball = less or NO pain, wrist muscles NOT used = healthier
THESE ARE FACTS.
If you're planting your arm on your desk and cranking your wrist to move your mouse all the time then yes, that probably would hurt. If you move with your whole arm, then you won't have that problem.
If you find that beating your head against the wall gives you a headache, you can install a padded wall, or you can stop beating your head against it. Your choice.
Sorry to resurrect an old thread, but I'm considering a trackball for the same reasons as OP (that and I've had enough of the mighty mouse) and I'm wondering what all the hostility is about toward the trackball.