my wife has had one on her 3G for 2 years. I've always used PowerSupport Anti-Glare and love them. She just peeled her IS off her 3G and may I say the phone is in practically pristine condition after 2 years!
I was not a huge fan of the "orange peel" feel and look but it served its purpose for 2yrs. There is some scratches on the back of the phone and some dirt that got under in some spots but overall I'm pretty impressed and so was she. She threw that 3G around, in the purse it got beat up pretty bad. The IS takes the brunt.
Also her home key was covered as well so that is a plus.
But Wrapsol is also another awesome product. Friend uses one on his 3g and swears after 1yr (he took it off the other night) very minimal scratches and dirt, etc...
so i'm not sure which one to get...
That's great to hear about the wrapsol. Since Power Support won't have one by launch day, I'm glad I bought the Wrapsol.