First off, this thing is HUGE. Don't let the product photos fool you, you have no idea how big this thing is. Second, it's very well designed. I was just struggling to connect the sides to the base because they were so tight that I really had to use all my strength to connect them together. This is necessary because everything is held together by friction, not glue. Unfortunately I crushed a few things when assembling it by laying it on its side/back, some of the buttresses were accidentally crushed. They immediately jump (there is foam), but now they are a little weaker. Some windows don't fit perfectly, especially the long pieces, so I cut them into smaller pieces and used extra pieces of double sided tape to secure them (there's tons of extra tape). Took me a few days to put together over the holidays (and I can usually put together 2 fun cube toys in 6 hours). My only gripe, if it can even be called that, is that it's so massive I can't find a place to display it in all its glory.
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