This is one of the best Lego sets I have ever purchased. It is completely worth every penny. The many features in this set make it outstanding. First, let me tell you about the characters. The characters are great. I love the new Ultron Mk 1 and the 2 Iron Legionaires, although Ultron should probably look a tiny bit more like the Iron Legionaires (He was one originally!). It's always nice to have an Iron Man figure in most of the sets, but I don't get why Thor is in the set. Sure, he only comes in one other set in this series, but I think it would be better to replace him with either Hawkeye or Black Widow. A Bruce Banner minifigure would also be nice. Okay, now for the tower! The 6 rooms in this set include the command center, balcony and medical bay and are each very detailed. I very much enjoy the exploding window function, allowing Ultron to easily swoop in and retrieve Loki's scepter. I am not sure what the room on the bottom floor next to the medical bay is supposed to be used for, but I just use it for storing my Iron Legionaires. Last of all, I am very impressed with the hidden blasters below the balcony and on the top of the tower. I don't see anything that could be improved in the tower, except possibly adding another floor. This set is meant much more for play, although it makes an impressive display. Buying this set is an absolute must for any Lego Marvel fan ages 10 and up.