My 3-year old got this for his birthday in the beginning of September. When asked what he wanted, the response was invariably, "A castle. With knights and a dragon." Well, we got him the Dragon Rock castle, as well as the dragon and rider and several additional dragon knights. The castle itself comes with several knights already, so he ended up with a good collection of warriors to start out.
First of all, I've seen this castle listed variably as Dragon Rock Castle, Dragon Castle and/or Rock Castle. Do not confuse it with the smaller and cheaper Dragon Tower that can be found in ToysRUs. This castle is big! It's 26" tall and takes up a good deal of floor space if you want to have room to really play with it. Plan 2 to 3 hours to build the castle - especially if your child is younger. For older children, building it is part of the fun. It is constructed of a *very* strong plastic and uses two types of connectors to attach the wall segments together. There are actually additional connection points that are not used if you follow the included plans. This gives the flexibility to customize the castle. The castle holds together well, but is just lose enough that under rough play, parts will come apart before they will break. This is a good thing - especially when played with by an extremely immaginative 3 year old. Note that the roofs of the towers simply rest in place rather than locking in. This is also a good thing, once you see this toy in play conditions. Another notable point is that this is a 3 storey castle. There are sufficient ladders and doors that the knights can get to any location by a real path. There is no "magical" jumping required.
The other thing to note are the accessories provided. There are a LOT of parts and many of them are quite small. Ladders, pole arms, shields, swords, but also daggers, beer mugs, torches, fish bones, and even some rats to scurry about. If you're not careful, it would be easy for them to end up in the vacuum. Fortunately, our son really likes all the detail, so he is very good about making sure all the parts are put away when done.
As far as play is concerned, this is a toy that gets play on a daily basis. Sometimes solo, sometimes with a friend, sometimes with parents. It has visible helped his fine motor skills and serves as a springboard for his imagination. He used some of his own "pennies" to buy a princess that he could lock in the dungeon and rescue. Sometimes the dragon is a good dragon escaping the castle or maybe helping defend the castle, sometimes it's a bad dragon that they have to fight. The flexibility in play is limited only by the child's imagination.
He is now asking Santa for "The good knights castle," which is his term for the Knights Errand Castle. He want's to be able to have the two castles have wars, rescues, etc.
In summary, this is an excellent toy that will hold the child's imagination. It is not politically correct, which I find a refreshing relief. It is definitely boy oriented with lots of weapons, armor and shields for wars, sieges, and chaining prisoners in the dungeon. The makers of this castle paid incredible attention to detail and quality.