I give my opinion after 1 month of use with a mouse "Roccat Savu". Beautiful carpets, simple but the logo makes a little more. The underside of the carpet is more than anti-déranpant, there is absolutely no move to where you put it. Part slides is really nice, the mouse glides effortlessly, it seems what floats above (there is no friction noise). The fact that he 3mm thick really suits me, does not meet his wrist too much compared to the office and in addition it absorbs fatigue created for several hours of use of the mouse.
I use it for the "gaming" and everyday use, I recommend this product and even mouse "Roccat Savu" because the two are a great team with quality / price very honorable!
PS: After 2 months of use, it has retained its effectiveness as the first day and it is not messy (I eat next!).