A shower niche is designed to provide a handy place to store shampoo, cream rinse, body wash, or other products used in a shower. As such, it should also provide a pleasing appearance in the overall layout of the wall tile with grout lines that align both horizontally and vertically.
This conversation is not focused on badmouthing someone’s work, but rather to help all installers understand what it takes to build a knockout niche. It should be a part of the wall tile layout and adjusted in size to provide a continuous grout joint across the wall, into the three surfaces of the niche, and on through the adjacent wall tile. As seen in the accompanying image, none of these desirable attributes are seen.