Mouse is nice but i have intermittent issues where the cursor becomes laggy and jumps across the screen making it hard to play FPS games and Games like starcraft. Turning the mouse off and on, removing the bluetooth connector make no difference. Checked the software and its up to date but it still does it. Not sure the cause and its not always this way. I have checked the lense for dirt and debris as well and theres nothing on it. The mouse is used on a mouse pad that is solid black and it is used for a couple hours a day. Normally the problem persists through the whole session and comes and goes every 5-6 seconds. Its interesting to say the least.