So this tour is still fairly new, and admittedly, there are still some wrinkles for them to work out. That said, it was great.
The castle isn't the sort of imposing granite castle like from Monty and the Holy Grail. It might be better to call it a palace or mansion? Regardless, it was an impressive building and the tour was definitely interesting. Lots of history, there.
The dinner was great, and all the beer or wine you could drink (just remember, you've got an hour-long drive back to Prague afterwards). The beer itself isn't sold; it's brewed and sold exclusively for the restaurant. It was also pretty good beer, to boot.
The show was great. A great mix, though unless you speak Czech, you're left to rely on the physical nature of it. I don't speak a lick of it and still enjoyed it.