Before that, there was RAT 9 and RAT 7 from Mad catz, but I liked this more. Very comfortable. There was a problem with the software that the computer did not see the mouse on Windows 7. In those. support was told to install some kind of patch for Windows (it even works for pirates). After that everything works fine. Some pros: Very comfortable It is possible to work with and without wire There has never been a mouse lost connection in wireless mode Weight setting Has cons: There are rubber pads on the sidewalls on the right and left, in the heat with intense play they peel off, it is clear that the glue does not like heat and starts to slide, I had to peel it off (it was not difficult, because it melted like butter). Glued on a good glue and all the problem was gone.