"My 14 yr. old son had been wanting this and saving up for it. He didn't know that I had already purchased it in anticipation of him getting the money. He was very happy when he was given the set. It took him two days to build it. He wasn't building the whole time though. He has enjoyed playing with the set and adding it to the Lego city that he and his brothers have built. This is not a set for people who are not experienced builders. There are many fun features and cool details."