I had to get a new mouse last week because my old faithful MX518 stopped working. I researched a bunch of mouses and wound up getting a Logitech G500. It got 5 eggs on Newegg and had nearly the same ergonomic design as my trusty 518. All that said, I went ahead and ordered it. I received it today and excitedly plugged it in. OH. MY. F******. GOD. The mouse was all over the place, hard to control, very imprecise.
I tried fiddling with all the settings in Setpoint. Nothing changed. The weights didn't really help either. I often pick up my mouse slightly as I'm moving it around. Whenever I do the cursor moves erratically. I never had this problem with the MX518. It feels worse than the crappy business optical mouse I was using while waiting for the G500 to come in the mail. The vertical speed is significantly lower than the horizontal speed. Probably because of where the laser is positioned. I don't know why Logitech couldn't keep the damn laser in the center of the mouse where it belongs. This is possibly the worst gaming mouse I have ever owned. Oh yeah, I forgot to mention the awful middle mouse button. You have to press it in just the right spot in order for it to be pressed. It feels very cheap too.
Maybe I don't have the right settings. Didn't think a mouse would need THIS much calibration. What are your guy's settings?

Maybe I don't have the right settings. Didn't think a mouse would need THIS much calibration. What are your guy's settings?