I am taking mine to Sawgrass Ford for some insurance work. The quote they gave me was very reasonable, hopefully the rest of the experience turns out the same.
I would take it to another shop and have them check it out. The install looks amateur and the fact that they had not bolt something up and use zip ties worries me about their professionalism.
I went with the 3M Crystalline, it had the best protection while not being to dark. I got 40% on the side and rear windows and 70 on the windshield (you can't even tell anything is there). However the downside was cost, $750 for everything.