content: The design is not far from the infamous Apple's hockey puck mouse. It's pretty much a round mouse. This mouse will give you super carpal tunnel.Other bad things -1. The button for the thumb is tiny and far far below where the thumb naturally rests. Pressing the thumb button is a huge huge effort in a very unnatural and unergonomic position.2. The button that should on the right side of the mouse equivalent to the thumb button for the right has been placed on top of the mouse after the right button. This makes the mouse round and uncomfortable, interferes with right clicking and makes that button completely useless.Maybe this will become more useful as I become more used to it but my hand is killing me right now from using it for about a week.