I personally have had experiences with both Rockblock and Bluebatmobile overlays...As a matter of fact, right now I'm in the transition of replacing my rockblocker overlays with bats, but there such a pain to play with! Bats is thinner, and also has a bigger cut out, so it is easier to work with, but it still is a tough work out even after you master the art of the overlays. As of right now, my car is sporting both tail light overlays (rox & bats), seeing as how they look identical, I'm not in the biggest hurry to finish the job, but I will eventually lol.