I was a big fan of this, my only issue was the surface material on the control side. After a while, it will degrade and the surface becomes uneven. Same with that Razer pad.
+1 for Steelseries. I use the QCK, but the thinner one. Awesome surface, smooth on the top, grippy on the bottom! http://shop.steelseries.com/index.php/surfaces/steelseries-qck.html
http://shop.steelseries.com/index.php/surfaces/steelseries-qck-mass.html Got this nice thick rubber/cloth one at home. Very comfy :) But I can't stand non-cloth mouse mats.
It may depend on the type of optics yer mouse uses.. What kind of mouse are you using? I got a R.A.T. 9 with the Phillips twin eye lazer. They have fixed the z-tracking issue ( It's completely gone ). However, The surface used plays a large part in the over all performance of the Phillips. ( I will lose x,y, tracking…