It badly ruins wall paintings

Everybody focuses on when tiles attached to wall and very satisfied. Today I detached it from wall after used it about two years and really really disappointed and shocked. It ruined all the wall paintings. Horrible wall surface I have seen. I have to hire someone to paint entire wall to cover all the damages. If you care about end result as well, do NOT purchase this product. It would cost you extra money to cover horrible damage on your wall. The reason I gave two stars is because of their customer services. However their products failed big time.

TJ Cho about Mixtiles - Photo Tiles, v3.5.2