Have been a few weeks, the Logitech MX900 mouse and can almost only positive news. There is really only one thing that I can criticize mouse: If you drive the computer boots is the mouse ready not equal, it takes about half a minute. The rest of the MX900 has exceeded my expectations: The precision and the responsiveness of the mouse I think is outstanding! No more jumping of pointer more, a phenomenal reach that surpasses the systems of traditional wireless mice by far and precise control which allows all optical mice, I know far behind. The Bluetooth Hub is easy to use and makes no problems at all. The only problems I had been with Bluetooth, caused the equipment I wanted to connect to the computer and not the Hub. And when I count up what a single Bluetooth Hub costs in addition with a decent wireless optical mouse, the MX 900 is a bargain! And who is not has sooner or later at least own a mobile phone via Bluetooth and can thus without problems to perform a synchronization with your PC, whether calendar, phone numbers or SMS. Therefore one must not even buy a data cable if you want to load inexpensive ringtones, pictures, etc., or other programs for his cell phone. I admit the MX900 four out of five stars, because five star would be perfect for me and there are four and a half star not.