Very sturdy with lots of level for play. Would be easy to put together if one knew the dimensions (in inches) of the posts. Once that was figured out, it was not difficult. The biggest drawback is that it is not carpeted or padded except for the top cat bed which is very nice and plush. The rest of the tree is covered with a material which is not scratchable to a cat nor comfortable to lay on. Overall, it was a good value for the price.