Very fun way to make a wall a bit of art and functionality for the kids. We added this to the wall in the computer room for something different and to help the kids learn more about the world.
It is a pain to put up with all the different pieces but if you take your time, it can turn out really well. I would advise using a level and ruler to aid in keeping things lined up and looking right. Also very useful to have two people for the setup so that one can line up the decal and the other can keep it from sticking to everything under the sun.