I sat down to do this puzzle, never having done a 1000 piece puzzle before. I gave up. My husband sat down and didn't get up again except to eat and a little sleep. He has 25 more pieces to go now. He is fascinated with this puzzle. The buildings are all a bit tiny and squashed together which makes it more difficult. Finished it is a beautiful puzzle. This puzzle is a 10 according to my husband. Plus he is learning more about London. He was in London several times, but this puzzle has just so much included in the picture.