I recentlyl purcased a new lap top computer and it did not come with a lap top mice which I shopped at my local Circuit City and when I the clerk recommended the Logitech v450 cordless laser notebook mouse and I bought it for 49.99. It was very easy the hardest part was getting it out of the package. I plugged the usb into the driver and it automatically starting installing the software and the mouse was operational within seconds. I have had this for about a week now and im very satisfied with it as it works on every surface I have tried including on a comforter. It has a on/off switch to conserve the two AA batteries that it operates off and it says that it should not go through batteries more than once a year. I plan to bring my reciept back to Circuit City as I found it on Best Buy's website for 10 dollars cheaper and I plan to get the money back as price match guarantee.