The F30.R (large) is a really good mat if you need a mat with extremely low friction. I think that Func have sacrificed a bit too much precision in order to bring down the friction, but that really depends on your style of play. I like my mat to have some degree of friction, otherwise I tend to overshoot the target while making fast turns. Tracking is still incredible - not at one time did the mouse skip on this surface, neither did the pointer jerk around while editing photos in Photoshop. Overall this mat is really a bargain if you want the mat with the lowest friction on the market. I have never tried a mat with as little friction as the F30.R, after using it a little while I was still amazed by the ridiculously low amount of friction on this mat.