I have been using Android 4.03 on two Acer ICONIA tablets: an A100 and A500. Other than some "app" compatibility, the recent Ice Cream Sandwich (ICS) upgrade appears successful. The user experience would however be enhanced by a proper user guide. I see another Acer ICONIA tablet model, the A200, is being sold with Android 4. For this, Acer does offer a downloadable manual that is helpful. However it also addresses some features, like the so-called "Acer ring," that do not seem to be supported on the A100 or A500. Has any one found another Acer ICONIA model-specific or general user reference document for Android 4? If so, please share that information. Thanks.