I purchased another mouse pad that was about 50% more expensive but it had a shiney surface and the mouse kept sliding off if I used it sitting on the couch.  Yup, I sometimes work sitting on the couch :) This one is a mat finish fabric and the mouse stays right where I put it, even if its on a slight angle. No more 'mouse on the floor' syndrome. Also both my Logitech and my Microsoft meeses, mouses, mices, mice, whatever you call more than one mouse, track really well on that mat surface.