Very well-built and of high quality. The stack gets pretty high and the players should be aware that a falling tower will most likely break a glass table, dent a metal one, or at least leave a mark on an individual if left to fall unabated. I love the grey stain and the numbering (for optional games) on most of the blocks. The carrying bag is a nice option and seems that it will last a while. The added whiteboard is a plus, especially when playing other games.