Instruct: Classify a given Amazon review as either positive or negative.
Query: The perfect mouse

I just bought my third G5 (this new blue one) for a new laptop. I've had two of the original G5s (one on my work PC and the other on my home desktop machine) for over two years. I do a lot of photo editing, and these G5s feel perfect to me. Being able to adjust the weight to individual taste, and being able to change speeds at the touch of a button, are brilliant touches.