LESS than skin-deep!
Firstly, this is the result of using poorly-trained and inexperienced tilesetters. It is also a bad interior design and/or engineering decision as this is an elevator and elevators constantly move and vibrate. What’s more, the pretty porcelain surface is nothing more than a printed surface, susceptible to wear and tear.
Compare and contrast with Bit-by-Bit tileworks, where we are highly trained with correct techniques to ensure tiles are fully supported by mortar so they are far less likely to crack under pressure, and we use traditional time-tested materials with color throughout, not just on the top. Choose wisely, choose quality over trendy!