Just putting these up. Going to add Smart Tiles to my new multi colored slate bathroom. After painting our newly remolded slate bathroom, when we finished the painting found lumps on the wall. Adding Subway Sand Smart Tiles above the slate backslash looks great. This is are first time with uneven edges, watching videos to apply very easy look beautiful. We used them in are other bathroom, they stick perfect, the humidity does not affect them. I only buy from this website, have read where some online store sell Generic and they don't stick. SMART TILES THE BEST.