As far as I know this is 3M tint, although honestly after an audio install gone wrong with the same shop, I have my doubts. The tint has held up thus far (less than two months later) although I have noticed some poorly done cut offs here and there.
Kept the cabin cool in the weirdly hot October we had, looking forward to testing it in the AZ Summer.
Side note, 20% does make night time backing up and shoulder checking a pain in the ass. I know it isn't the darkest tint around, but it is still very dark. Were I to go back and do it again I think I'd go 35% all around.