We installed these tiles in the typical old farmhouse "added later" bathroom. The ceiling is lathe and not quite square,and not even. We started at the center with the light fixture and worked out way out as directed and it turned out great. We debated weather or not to paint them,and in the end did not and they look fine. They have held up fine as well even over the shower with the steam and all. My fiance and I did this together,and we had no prior experience, and are still engaged lol. He stayed on the ladder and told me the measurements and I cut and applied glue and handed them back to him to place. We have received a lot of compliments on our bathroom makeover project. We will definitely use this product again as we work on the house.