I have the teraflex HD carrier and hinge setup. Install was easy enough. The arms of the carrier plate that replaces the hinges are wide enough to not expose any of the unpainted parts of the tailgate. I've read that thats a problem with some of the other hinge replacements. I don't think I'm alone in not liking the way the tire mount attaches to the carrier plate. I accept that it works and it will hold, but I just don't like the way it works. I don't think I installed that mount quite deep enough and I expect it'll be a bit of a challenge to adjust after it's been torqued down. It's holding my 37" spare fine and only wobbles a bit when closing the tailgate from what I can tell. No rattles or anything driving around.
I went this route for a couple reasons. I had a bumper mounted tire carrier on my TJ and it annoyed me since I used my cargo space frequently. It was an inexpensive carrier with an inexpensive but effective latch that wasn't immediately obvious to someone (wife) that it was completely secured if they hadn't used it before. This resulted in one trip down the highway with the carrier swinging out. I was really considering the LOD destroyer bumper with tire carrier since it attaches/integrates with the tailgate. Ultimately I decided I wanted aluminum bumpers on my JK tho and that was the deciding factor.