I bought the BODYGAURDZ brand, and am happy with it. Touch isn't affected. I had trouble putting the front piece on, and have very small spots under the film, which is actually the adhesive that didn't disappear. They can be seen when the phoneis sleeping and the background is black, but when using the phone, they don't show at all.
I was tempted to take the front off (after repositioning it several times to get the adhesive spots to disappear) and use the second piece, but I'm going to wait until this piece gets all scratched up. The rest of the pieces fit very well, and I'm not concerned now with the back and corners getting scratched and nicked. I carry it in my pocket, and after several days now of pulling it in and out of my pocket, all of the pieces are still in place and not pulling away. I'm satisfied with the kit, and for $24.95 delivered for two installations, a good value.