Just got the Invisible Shield for my new touch. Seems to be working fine so far, no real noticeable reduction in touch sensitivity and it is protecting the screen really well.
The cover for the screen was quite easy to fit and went on well, however, I had a real struggle with the cover for the back of the touch. It was really fiddly and is still not really very good. At least you can remove it for another go so I'll have to have another try next weekend.