As in the cupboard I have to ask each other for lack of space, the cups, glass pieces are my already broken from the edge with 2 cups. I find that very annoying to see the cups but from quite stable.
Furthermore, some of the wobble cups. They would not fall over, but they are not fixed and they can turn on a Tile Coaster loosely around herself. The little irritated when you reach for the handle.
Conclusion: I would not buy it again.