Instruct: Classify a given Amazon review as either positive or negative.
Query: Glitchy and inconsistent at best

I have to agree with the other negative reviews. I just purchased this at BestBuy for a good deal and have always been please with Kensington until this POS. For starters, the responsiveness is very fickle - sometimes you click on something and it opens - other times you can click away and it's as if the mouse has died...nothing. It has a tendency to be jumpy too. I have tried changing the settings every which way but still no luck in how this mouse handles. I am not a gamer, I just use this for everyday browsing and computing purposes and so far, I am extremely disappointed in this. I am considering taking it back as previous wirelss mice have never given me so much trouble. Yes, it's pretty. Yes, it's laser and feels nice in your hand but who cares when you feel like throwing it threw a window every day!