"The creativity of this set was great, but the way it is assembled is terrible. The only bricks left are the "nubs", so I know it is assembled correctly. The issues lie with how the smaller assemblies or add-ons (i.e rock wall, windows, etc) are set into the main building openings. Two little nubs are not enough to support the add ons. When adding the last upper floor add-on the entire upper floor fell apart. Using a 1x4 plate with four nubs would be much better than having a 1x4 with two. I have been assembling Legos for over 30 years with children and grandchildren, and the only other flimsy 'building' I have seen is the Hogwarts express station. Sorry, but I am disappointed with this product."