Interesting idea for sure, having this rather than a clearcoat or mylar   I'm keen to know how it will hold up over time. The only problem i can think of is that the dirt could find its way underneath, but even if it did it would be easy to remove for cleaning!

Anyway it sure does look good when on 

Maybe around the edges like mylar given how generous the "cutlines" are around the major playfield components, but aesthetically it looks as good as a professional clearcoat. 

Thumbs up from my perspective.