Positives:
+ "Liable" very well on smooth surfaces,
+ Well-structured, texile surface with nice haptics,
+ Is not sweaty even after hours of use,
+ Suited for mechanical, optical and laser mice
+ Good price,
+ Can be rolled up to save space,
+ Nice and flat, good for the wrist.
Negatives:
- Through rolling up the packaging from day one slightly wavy,
- Very thin and flexible, so to use on uneven ground hardly.
I can not make any statements about the durability, but I have not been long enough in use. If it is intended for use on a flat surface, I can only recommend it. The one point I prefer the waves and the restriction from the underground.