Especially if you intend to use it for gaming. It maybe a driver issue but it is less smooth than the old wireless Logitech (ball) mouse and much less smooth than an older corded Explorer optical in gaming.

In windows apps it is useable but still has a slight latency to the pointer movement which is not pleasant at all. It's also enormous so if you found the cordered Explorer optical to large you'll hate this one. Think I'll stick with the Razor Boomslang 2000 myself....... unbeatable for gaming smoothness if you can live with the regular ball cleaning and odd shape. I may try to live with this Explorer Optical Wireless mouse for windows apps as the "cordlessness" is very nice.

Stealth Cooling Project