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

I give this mouse 1 star and not 3 too bring its rating down.CONS: doesnt work well for gaming.Any quick movement will jerk the pointer all around the screen, AND YES I made adjustments in the options/settings.The forward and back buttons dont work on my mouse--can anyone tell me why ? i dont see a setting for itThe thumb groove doesnt conform to my thumb.