$80.00 to install moleskin is a little steep. The fact the he admitted to cutting out wipers is a huge red flag. If you cut out the wiper it will increase rattle probablity, road noise, wind noise, etc, etc. DO NOT CUT WIPERS!! He obviously likes to take the cheaper, easier road. Not a good quality in tinting.
My advice, keep looking until you find someone who does exactly what is needed. Then look at and example of his work.
I just tinted my TL a couple weekends ago. It turned out great. 18% rear and 35% front. Whole 1/4 done, and felt installed. If I remember I will post some pics.