Touchpad motion is rather jumpy. There seems to be no way to turn down the sensitivity of the actual touchpad. The sensitivity slider in control panel doesn't change anything.
Most of the time touchpad remains enabled while typing, even with the option to Disable touchpad while typing. Occasionally it will remain disabled for a few seconds.
I haven't figured out the exact onset for another quirk yet, but it seems if there's a thumb or a palm of hand in the sensing field and I quickly press the left touchpad button, it triggers a context menu as though I pressed the right button.