I purchased a crystal film from Power Support.
I could see some imperfections that looked like like bubbles on the film (pre-installation) as well as one slight crease (likely from shipping).
I figured this stuff would work itself out upon installation, with a bit of time to cure. Unfortunately all the imperfections are perfectly visible, as is the crease.. which looks the worst.
I'll give them a call or drop them an e-mail to see what they offer for support, but so far I'm unimpressed.