“3-Piece extendable roll to assist with rolling up the jigsaw mat” – this is a bit misleading, it is just three cardboard tubes, each smaller than the next. Not really extendable, they are all separate and you just have to fit them inside each other. “will lay flat no matter how many times it has been rolled up” – again a bit misleading… It DOES lie flat, but its been sitting on the floor for a couple of weeks now with a heavy board on it, and have given it a gentle iron. The mat came creased/indented from being rolled in the pack for so long, and won't give those up – maybe as long as you put the mat on a good flat surface it won't affect your puzzle fun, but still a bit disappointing. About the only thing it does do is roll and unroll…