I received a MS BT mouse about a week ago and the setup was very simple. The only problem I'm having is that the tracking is jerky and it feels unprecise compared to my Logitech MX500 mouse. Also, it doesn't seem to honor the mouse tracking speed preferences. I tried the BT mouse on an XP system and the experience was much better, so that rules out the possibility of hardware failure. Has anyone else had similar experiences? Please share. Thanks.