I have both Sidewinder X6 and Logi slim Illum. The Logitech I use at work. It is by far the better keyboard when it comes to typing and everyday use. That being said, the X6 is not a bad keyboard, but you can definitely feel the quality difference. The Logitech is much more solid, and a real pleasure to type with. I use the X6 for my home PC which is mostly gaming. Its got a good layout, easy to reach volume knob for when it is dark (watching movies/games all seem to have different volumes, so hitting that knob fast is a real bonus). I also moved the numpad to the left hand side because it fits my desk better.