FYI, Adam's have a 25% sale on all the graphene products
As far as I can tell, both this and Gloss-Coat should be as easy to apply. I would go for graphene if the car has a vibrant color, red, blue, green or any hue of those, including metallic. Silver, white, black Gloss-Coat.
And to throw a curve-ball... Kamikaze just released their ISM 3.0 in June, I really didn't like ISM 2.0 for beginners, as it was a PITA to apply, like Opti-Coat 2.0 and Opti-Coat Pro. ISM 1.0 was easy. ISM 1.0 over Miyabi is what they used in the Ferrari La Italia. A little more expensive, but as far as DIY coatings, Kamikaze is one of the best right now, especially their Zipang.
Lastly, remember that the coating will protect whatever is under it, so any imperfection will be there permanently until the coating is polished off.
Nice. Grabbed the Ceramic Spray Advanced, the Graphene Shampoo to try, and their wheel cleaner.
BTW, use Coupon Code: AZ8291
for 25% off your entire order, not just graphene products.