I have the 20inch model touch-screen PC (a previous TSV).
In general, I like the touch screen, EXCEPT sometimes it doesn't register and you have to touch it a few times, and also, the screen often zooms in to HUGE print of its own accord. I think that, unless you move your finger exactly vertically (to scroll the screen up and down) it thinks you are trying to enlarge it.
I have had to keep my old XP PC as I can't get many things to work on the HP. For example, if I record music from the web using Audacity, it also records all the sounds in the room from the built-in microphone, and I have found no way to stop this.
Actually, the instructions are non-existent, and the tutorials are pretty useless, and don't ell you half the things demonstrated on QVC. That's why I am watching the presentations, hoping to learn how to do things on mine.