"Causes freezes when switching users in Windows 7."3.0 starson by Mips77
Pros: Works well and is small enough for children (5-7 years).
Cons: Caused freezes of Windows 7 (64-bit) when I tried to switch a user (without logging out first). When I removed the mouse (and the USB dongle) and restarted the computer, switching users started to work again.
Summary: Good unless you want to use the Windows feature of switching users without logging off.