I got the USB mouse just, here my first impression:
Super, exactly what I wanted! Optical mouse fits almost perfectly with my white Eee. The size I find the right place. After inserting the batery, I had almost overlooked in the paper package, you need only turn on the mouse and press the Connect button. After starting the Bluetooth Wizard, the mouse is found immediately and works without problems. Even the scroll wheel is not loose but has a pleasant resistance, but could be a little quieter.
The best thing for me is that the mouse works without additional drivers and rambling Softwarinstallation. The scarce resources of the EeePC is not unimportant.