After more than three years I had to gradually replace under my G9 the Originalpads. The Orignalpads had perfect gliding properties, but were so far down that the mouse gradually scraped the plastic base on the mouse pad (Razer eXactMat). So "changing tires". I had previously had very good experience with Corepads Skatez 13 - which are unfortunately only knows otherwise perfect. The offered EBOTOX Hardcore Skatez (BOTOX for my mouse ???) are black - but much, much too thin. Since even my worn pads had more "tread depth". The assembly is okay, fit is also okay. Material quality inferior. Absolutzer KO-point: They are just too thin - guess that the G9 touches down after a short time. Then better yet the white feet - you do not see in operation anyway. Or I'll try to get through the Logitech Customer the original pads.