I just got this mouse today in the mail, and I must say I love it. It's got the best reaction time I have ever seen. My older MS mouse had a little lag in it. Plus this one is more than twice as smooth. But the problem is with the feel. It does not feel good at all near my pinky (left side of my hand). Is this normal at first ? I guess it will go away after time... It's like it's puttting my hand into an un natural position. I think it might be bad for my hand over time.