Instruct: Classify an Amazon review as either positive or negative.
Query: Great mouse for RSI, I couldn't believe it!!!

I'm an IT guy, I've been in the business for better than 20 years. Using a mouse is a big part of my day. After years on a regular mouse, I developed problems with my wrist and elbow areas (all at once very painful). Using this mouse has cured my wrist pain, it's gone away completely and not come back. I bought 3 of these things, one for each computer. It's been a great solution in getting my hand oriented in a vastly different position than I was used to!