I'm a huge fan of film....
Have not used Opti-Lens

Prior cars with film, ie, ventureshielf (formerly trumped by Xpel Ultimate)
There was one area that hazed up due to enviromental, and the rest (meaning the plastic under the film if not the film) was still clear. Granted, there is a smigen of cloudiness on the film, but that's just the nature of film...

MOST people don't get the fact that ppf is extremely porous. Don't let the naysayers tell you otherwise. My ppf guy won't install film on white cars. I've removed film off X cars and when the film is yellow. You don't see this clarity issue on paint....but yeah, raw film takes in the gunk ...