Pain despite the use of the mouse as WowPen Joy Mouse, actually it missing was buying a mouse pad gel wrist rests ... I am interested in the Kensington brand since I bought in the same time their classic immense and awesome Expert Mouse trackball.
The wrist rest is effective in my case 100%, the WowPen was a huge failure for ergonomic mouse, its relatively small size and its handling was causing painful rubbing of the long side of the hand and the bottom of the palm against the mouse pad.
With this wrist rest is finished I could spend hours on the net.
I note that my two mice (one Logitech Mx 700) have not had a problem with the lining of the carpet can be a problem sometimes with some sensors, but the parade is easy, just buy a good mouse mat quality in the genre for players and it's good.
I now use this Duo Gel Wave with Trackball Expert Mouse and the least we can say is that it was made for each other. : D
The gel is firm enough especially when compared to the same model keyboard (also essential I assure you), but you get used to good.
The coating is very nice smooth rubber in contact and easy to clean.
I like the design and there is lots of different two-tone model.
It is a well designed product and really cheap given its usefulness.