The weather wasn't great the day I went, so overall I'd only give it three stars. It would probably be much more beautiful with better weather.
First, the scenic area isn't close to the city center, so it's very inconvenient without a car. It's quite large, and walking around can be tiring.
Second, there are a few castles inside that are indeed beautiful, but that's about it. There's not much inside the castles.
Overall, the ticket price is too high. The scenic area itself is okay, but considering the ticket price, it's not really worth it.