Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Don't buy it
Review: Amazon shipped me a used one of these mice, it didn't work right so I shipped it back and the replacement they sent was also used. The second one worked ok but it was only a matter of minutes till my hand/wrist hurt because of the bad ergonomics. The batteries are in the back of the mouse near the "butt" of the mouse which makes the mouse feel imbalanced when you pick it up. As if that wasn't enough of a reason to avoid buying this mouse the pointer stops moving or jumps across the screen so frequently that I couldn't stand it and quickly returned the mouse for a refund. Consider yourself warned, don't buy it.
