Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Functional -- to a point

I was excited about my Mighty Mouse, because I do a lot of horizontal scrolling.Downsides:The short cord (VERY short -- get an extension if you don't have a laptop) is a bit of a bummer, and the left/right click recognition is a bit messed up, and the side buttons are basically useless (I am unable to get my fingers into a comfortable position to use them)...Upside:That said, I still liked it. I like the programmable scroll button and the feel and size of the mouse. I like the quiet whirring the scroll ball makes when I spin it.Ultimate downside:So why 2 stars? Well, maybe mine's a fluke, but after two weeks of standard business use, my scroll ball has stopped working. I consider that unacceptable and it makes me think seriously about returning (not exchanging!) the product.