However, as a previous speaker already criticized here, there is an edge at the perimeter of the pad. At this the mouse triggers and one comes only with a resistor on. That's very annoying. The problem appears in some batches more pronounced than in others!
An alternative is the wrist rest Fellowes, which is a bit higher and not as soft. There are other manufacturers, but which does not contribute a groove in the palmrest to hygiene, since there gladly fall for crumbs etc.. A better alternative, it seems but little to give.