Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Barely basic
Review: I'm a CAD jockey, which in laymen's terms, means I make computer-aided drawings. This was a backup mouse for my laptop, but it's barely adequate. If all you're doing is browsing the web, it's fine, albeit a bit small, and only 1/10th the functionality of my MacBook track pad. However, the scrolling is jumpy, and in AutoCAD, it's completely unusable for panning, zooming, and orbiting. The useless magnifying button isn't programmable, but that's not unusual for MS. I don't recommend this mouse, because you can get a better one for less $ that lacks a useless button. I must say it does feel comfortable, which is about the only thing MS seems capable of doing.
