"so many companies have tried to cram as many buttons on a mouse as they could, many times it is just not functional. Buttons cant be pressed easily, you hit multiple buttons at the same time, etc. With the Rival 500 SteelSeries has done a really good job making the mouse functional"
Bob Buskirk - ThinkComputers.
SteelSeries Rival 500 mouse review by ThinkComputers - Introduction & Conclusion.