Instruct: Classify Amazon reviews into positive or negative sentiment
Query: JackO

I wanted wheel function and optical was the rave so seemed the way to go, but this item needs some work. I had this MS version (which did not fit me ergonomically -- right handed) and the Logitech version (which did) and they were both vitual peripatetic wonders on the screen, jigging here and there at their own apparent will like dogs on a leash. I used the PS2 port; didn't try USB. Did try various surfaces -- wooden desktop, mousepad, paper, etc. -- but nothing cured the problem. Tried convincing myself that I just needed a new system but couldn't buy it. Returned them both and have settled on a Logitech cordless ball version, which works great.