Instruct: Classify a given Amazon review as either positive or negative.
Query: ouch

I got this mouse about two hours ago. I wanted a new, ergo mouse. I have small hands, and maybe it's that, but I had instant wrist pain/numbness, my palm hurt after about a half hour, and I'm going back to my original Mac Mighty Mouse until I can find a decent ergonomic mouse that won't make my hand and wrist problems worse. I'm really disappointed, because I had very high hopes! I'm returning it tomorrow.