Recently, I found my old classic roller mouse (with THAT ball) screwed up. And then, I should admit, may be that's been its time to die. May be my maintenance isn't enough, but then I think, "Oh well, it's been 5 years already".

Thanks, roller mouse, you've been helpful for this 5 years. And for myself, I think, I should submit myself to a "new techonolgy", eye-optic mouse. Lessee how long time it will hold on this time.