We have a mixture of C-Touch (about a year old) and CleverTouch, and I think the Clevertouch boards are far better. They are all pretty robust these days in terms of front of screen impact etc. Any light scratches could probably be taken out with Brasso or similar, but we have not experienced that problem. In terms of build quality there is little to choose. In aesthetics, I think the Clevertouch screens look nicer, but in terms of the software, the bundled stuff you get (and the ease of use) with Clevertouch blows the C-Touch out of the water. We even had a demo of the new release for CV-Touch, which looked worse than the original! As for the built-in android, it is a little early to say how useful it is, but certainly it allows the user to work on the screen straight away without having to log on to a computer, and if you have a Wi-Fi dongle plugged in, you can download stuff from Google Play. I agree with RichP and in answer to the OP, sound can be a little quiet in an active classroom, so a sound bar should be considered. One for the CV-Touch is 500 quid!