We assembled it about a month ago - took two full days of work with 2-3 people. Definitely organize the lumber and parts before you start - and use the app! It was very straightforward. The kids love it and it looks great with the trees in our yard. I did eventually add a couple of additional supports to the small ladder platform (not pictured) and I may end up adding some to the turret as well. The wood is good quality but pretty soft and does split easily. Seems plenty sturdy for the kids though. They are very happy with their new treehouse!