I bought this LEGO for my granddaughter who loves to build things. She handled this in a morning and is 9 years old. My only complaint is that I did not realize the finished product was so small. I am not sure what I expected, but it was such a small replica and seemed like a lot of money for the small size. That is my only complaint.Great item!Fun and a little bit addictive. I bought it for my wife and she went to town on it. I will probably buy another in this seriesWell, I bought this for my 9 year old grandson and he finished it in a day. Sent me pictures and was thrilled. He loved it and was very proud of completing it. I love Legos. My son played with them when he was a child and they still make a wonderful product. This series is also wonderful in the exposure it gives to children of famous international buildings.It was beautiful but I didn't have it up for long. I hope to be able to take it back out in 2020.I have a 9 year old grandson that we bought this for. We needed something challenging for him. He can usually work a Lego in less than 1 hour. This one took him about 4 hours. Beautiful product! He loved it. The nano gave him a little more challenging d/t the size!funMy grandson loved it!I brought this for my grand daughters 13 birthday. She is very fond of Lego Friends but wanted to try something else. When it arrived, I was surprised at how small the box was, compared to Lego Friends. However, she loved it. It was a bit challenging but she managed it within acouple of hours. Since then she has taken it apart and rebuilt many times, so the time limit is shorter now. She has asked for the Sydney Opera House for her next present, so she must like it. I just wish they had these when I was younger, and I would love to build some now, but my hands and fingers won't allow it!!! But it gives me pleasure to see her enjoying herself with her Lego collection.I got these items really quickly which was great as i needed to send them abroad. Would definately order from here again.. My daughter was given this as a presen and really enjoyed putting it together which was fairly easy and she is 12. The finished product is quite small but its intricate..Bought this as a present for a friend for Christmas, it arrived quickly and looked great and my friend on receiving it, loved it and built it straight away. Even though its designed for children, my friend whose 21 proved that even adults can get a lot of joy and fun from this.Bought this for my 9 year old grandson as he adores Lego...this is excellent, lots of very small pieces, so it takes a little while to do which is good, but in my opinion, disappointingly small. A larger model would be a lot better.Lots and lots of tiny lego bits. My daughter who is 10 did this on her own. It took her about 4 hours in all. Looks nice but there were a few bits missing in the set. When I contacted lego they send them out in the post free of charge