My experience:
Background: No wrap experience, but fairly detail oriented. Used to do some freelance detailing back in my younger days.
Good: Finished result looks good. Application is not terribly onerous, but does take some time. Certainly does not take special skills and is fairly forgiving. Videos are clear and quite helpful. I'm guessing it took about 6 hours total for me (I did it over 2 days, so hard to be exact).
Bad: For some reason, I had real issues with P-T3. I blew through both of mine, and the second was far from perfect, but oh well. I'm guessing that with the mirror somewhat in the way, I tended to stretch it a bit, which caused issues (I did better on D-T3, which I did after the passenger side). I had a couple issues with the packing, mainly with the T1 pieces, I think because of the unusual shape. The P-T1 piece had a crease that didn't fully come out when I applied it. Also, the T1 pieces had some of the backing come off a bit, which caused one of my P-T1 pieces to get some cardboard fibers on the adhesive side. Not sure how this would have affected application, as I used the other one. My kit was sitting around for a few weeks, which may have caused some of the issues with the T1 pieces. Everything else was fine, as the pieces were either rolled up or packed flat, so no problems with creasing or backing coming off for those.
Suggestions: As some have already suggested, a 12V or cordless heat gun option would be great. One of the reasons mine sat around for awhile was because I had to wait until I had access to a garage with a power outlet (I live in a condo, with no plugs available). Another easy addition I would recommend would be including a piece of scrap for any small issues that arise. For me, there is a small sliver of exposed chrome on the camera and while I have plenty of extra material, I don't really want to cannibalize a nicely pre-cut piece when just any small bit of scrap would do. Seems like a cheap and easy addition that I certainly would have made use of.
Overall, I highly recommend the kit. Videos make the process pretty straightforward, so I really believe that most anyone can do this.