The mat is basically circular, but with one side flattened out and including the addition of a raised gel pad.
You rest your wrist, or ball of the hand, on the pad, thus elevating the level of the fingers as they wrap around the mouse.
I have persisted with this mat since buying it, but I honestly cannot say that I find it any more comfortable or easy to use than a regular flat mouse mat. In fact I would go as far as to say that it can actually make my wrist ache if I am using it for prolonged periods of time.
I assume (possibly incorrectly) that there are some ergonomic and muscular advantages to this kind of set-up, but in truth I have not checked out the facts.
Whether or not I will continue to persist with this mat I have yet to decide, but in my case at least I do not feel that I have gained any real advantage from using it.
