Nice fix for popcorn ceilings in large rooms. We are in our 60's and it wasn't to bad an install. Don't recommend liquid nails, does not grab quick enough. We used Loctite power grab, held great. We did cheat on one very large and heavy chandelier, just dropped the ceiling cover  then cut the circle in the middle of a tile and split the tile to just one side then slipped it around the light hanger.. Don't really notice the seam. Over all great product!