I have not heard of this spray on version but I can tell you the shop installed sheet version is great. Can't even see it unless the light is right then you can hardly make out the edge on the hood. They had it installed
and my windows tinted in like an hour. They did the whole front including fender fronts, the sloped front of part of the hood and also the mirror backs.
$500 for the bra.
Bravo Protection Products | Clear Bra and Window Tinting
This worked like a charm because they were 1/2 block from the dealer where I picked the car up, drove it over right then.
The trick to maintaining it and keeping it looking good is to not let bugs cook on it long term. The owner of the company still has his on his truck at 100k miles looking good.