I would also agree that the Blackfire is easier to use and WAY more forgiving in overapplication scenarios. UPGP has a fairly steep learning curve if you own a light colored car. I really dont think it matters who advice you take on application. If you make mistakes on a light color, that sealant cures very hard and is super durable. On a white car, the first time I used it, I basically had to polish all the high spots off a couple days later. they were still there after a wash and quick detail. Once you figure out how to use it, it has some serious durability and sheets water in amazing fashion. but I still have some trouble with it.
I found the Blackfire to be easier to use the first time I tried it. It evaporates and disappears easier (I guess self leveling). Plus you can feel it get slick right away so you know you hit that spot on the panel already.
