It's a great castle, maybe you've seen my review of it.
While it's no steck and can only be set up in one way, it is a very beautifull castle in that one setup. I just love the gateway with breakable porticulis and falling stones. Great for a siege battle.
I saw the review. We have the 3666 castle (you can see a bit of it set up behind the boxes) but its super old and a lot of the pieces are broken. Its only built the way the instructions say to build it.. we are a non-creative family

Hahah.. But I wanted to get him something new. I love the look of the Lion castle and all you can do with it so I wanted to grab it before it got discontinued. I dont like the look of the new one that just came out.
Ill be putting it together Christmas Eve night so its all set up and under the tree come morning

The agents cave is AMAZING!!!! 
That's a great set with a ton of goodies and potential as Tahra had said. 
Logan (my son) has been head over heels for the secret agents sets since he got some Agents in the Blister packs. The Castle and the Secret Agent cave are going to be from Santa. I got him some knight sets and the secret agent car and motorcycle to go with the Secret Agent HQ so Im hoping hes all set with some new sets for the next year.
Gawd, playmobil is taking over my house. LOL