i got the Kinzu and i have to say its been stable since the day i installed it,
previously always having razer mice and them failing on the hardware generally the chord,
i went with the steelseries and it has been a good solid buy,
drivers are fine, configs load well and generally the mouse is a nice size
the weight of the mouse is fine
however i cant comment on the mousemat issue but overall its a good solid performer
price wise i would have to say a little over priced if im honest.