I just got this mouse about 1 week ago(new), for wireless, its nice, it seems alil too bulky for my taste, but I'm a gamer, response is nice, but could be alil more quicker, too early to tell you on battery life. plugged it in works perfect, no drivers to install( thanks to XP ) just installed and was instantly running, I'm thinking about trading mine for the Microsoft Intellimouse Optical(new)... anyone want to trade?!