I have installed the protectors on my TAF, AC/DC Premium, Fishtales, Terminator and (soon) Getaway.
Pros: The look is great, the protection is perfect and the amount of time needed for the installation is absolutely "fair" for the result you get - I am very satisfied.
Cons: The ball flow is a little different (it feels a little bit slower, but not in a bad way) and you definitely get more airballs. I can't say how often airballs occur compared to a normal playfield, but it is noticeable. I don't see this as a problem for me personally and I haven't damaged anything because of the airballs. Very slow balls get sometimes stuck, but very very rarely (ACDC never, TAF inlane rollback at the switch) - a simple nudge does the trick.