I purchased 4 sets of panels for our office space at our WeWork building. Because it is a temporary space, we can't make marks in walls and our specific office has a cinderblock wall and concrete. It was hideous and everyone thought we were in a dungeon or basement for zoom calls. First I tried the application with the Elmer's putty which was great for a while, bit I didn't clean off the cinderblocks before and there was a lot of dust and I think that.is why they fell down. So, after that, I went ahead and got a hot glue gun and used it and it was amazing. A few burned fingers and a headache and voila! It totally transformed the space and it looks so much better. I think they should pay us because it was terrible before.