"This is one of the best lego sets ever. The set is full of little details and has an amazing exterior to display. This set is also good to play with because of its open back and also the amount of cool design will also help you become immersed in the harry potter universe.
The main positive of this set is the exterior and when it's on display it really comes into its own. It also helps that Diagon alley is a really iconic place and lego did a great job of recreating it. The colours of this set are bright and in your face so you cant miss it but also some of the buildings are dark so you can display its next a modular lego set and it will fit in fine. The build techniques in this set is also fun and unique with a cool chimney for Olivanders and a unique mechanism for the Weasley Wizard Wheezes shop as well as a cool slant for the front of Quality Quidditch Supplies. Another cool addition is the greebling of the street and the fact that you can move the building apart and create your own street
A few problems with this set is probably the minifigures though they are mostly fine its more the facts that they repeat too many prints. Another thing is that its annoying that they did't have key characters like Mr Weasley and Rita Skeeter However Lockhart is amazing. The main criticism of this set is to do with the lack of a couple of key shops E.G The leaky cauldron, Borgin and Burkes and Gringotts (this might be made as a set individually). But most of these are nit picks and don't really take away from this set.
Overall this set is super cool and is both a great display piece and also a good play set. I would recommend this set to any Harry Potter fan even though this set is a bit expensive and also you could get Hogwarts for the same or £20 less I would say it is worth it. Also box 21 is a neat surprise"