I haven't done mine, and would let someone else anyway. If I did it 99% perfect, then just means could be better!
Seriously, though, was wondering how much the fine glass scratches show up with a tint, and how much the existing felt guides rub on the tint over time. I have new glass to install, but was always curious. I'd only get a light tint, retain the classic looks.
I spoke to the guy years ago tinting my daily driver, mentioned the rear window of Firebird and suddenly he was having flashbacks to Nam...done a Camaro once, and it took him several attempts to get it right, possibly 2 pieces also, can't recall. And demister grids are worse. He was not keen at all to do another, said find a rear louver instead! I will have the rear glass out one day for paint work and rear shelf metal repairs, I'm sure tinting may be easier with glass out on a stand. Not sure if they'd still run it to the edges or leave a border for sealant direct to glass. That's for them to worry about.