Parts and construction is mostly sturdy. I was very gentle screwing wood screws into place and 3 times the wood stripped--I think the pre-drilled holes were too large. The wall on the bottom floor is warped out of the package and the hook & loop sticker on the ceiling of the second floor is on the wrong side--at least based on the pictures seen on the company's website. This results in the green fan in the purple living room (instead of hanging in the green plat room). The happened because there are no directions that indicate the side matters at that stage if the build; so I put the wall in place as seen on the KidKraft website, with the purple wall facing the downstairs. I didn't realize I had to look at the piece that would be the ceiling of the second floor to determine which side the green and purple walls should face. The solution will have to be another piece of soft hook & loop to glue onto the ceiling. Frustrating, as I built it the night before a double birthday party.