Quality problems, sensor defect repeatedly

I own this Razer Mamba and its previous version. Both have adjusted over time (less than one year) your service. It was always the sensor. First, the mouse pointer does not move when using eg a Razer Gaming Mousepad (in black), on the bright desk it went. Then the mouse pointer moves at once on the desk by leaps and bounds and is no longer usable for games.
Had the first time my dealer nor exchanged for the new version, the warranty has now expired. Unacceptable for a mouse that costs more than many complete Android Tablet.

The Mouse is even super. It lies comfortably in the hand, even after 8 hours of professional and then all evening private use no pain, cramps, etc .. The wireless technology is also great, only the battery does not last all day. But you can pack in so breaks again on the dock or simply connect the cable.

Overall, the advantages but the lack of durability not outweigh, particularly at the high price.

This mouse is in the quality rating unfortunately failed!