I just finished a denim room and linen room. It was alot of work, but the outcome was great. I don't know if I would do it again, but I'm glad with the results and so is my teenage son (it's his room). You have to follow the instructions on the video exactly and you CANNOT go over a section if it looks bad. You have to paint it over with the base coat.
I am looking for a border that would compliment the denim.
By the way several people asked if it was wallpaper.