I've had the skinomi on for a few weeks now. It is the most impressive protector I have ever seen.
I can't see the original scratch, nor can I see fingerprints much. I can see better in light and it feels better than the gorilla glass- smooth but rubbery with no grab. It is as responsive as stock and has no dulling effect on the screen.
I do have some scratches-more like pits from having it in my pocket with keys and a lighter and other stuff while climbing around at work. I realized I had my full bodyweight on it and I feared I would crack the glass, and it's hard to describe how I knew I had given it way beyond normal abuse, and I have cracked a screen before with half the pressure- these pits haven't gone away so I ordered another one without hesitation even though I can only notice them on angles, and even then not much (I could have gone for the lifetime warranty replacement but I feel I really pushed it beyond its purpose, and it's too much hassle -with the GET25 discount it's only $8 anyway, and I was getting one for my wife's Desire that I gave her when I got the Defy). If I had my Desire in my pocket that day, I would guarantee it would have cracked.
I can see no other scratches, and one's I have had just fade away in days, as it is self healing.