I don't know if there's some software interfering with the touchpad, but I can't get this thing to work. Moving my finger across the touchpad makes the mouse dance around in different directions, but not the one I want it to go. The right-side slider thing works fine.
I'm currently using Synaptics driver version 220.127.116.11 on Windows 7.
Something I just noticed. Sometimes, if I don't use the laptop for several minutes, the mouse will work fine for about two seconds, then go wonky again.