First, the good news. The castle is awesome, a real historic gem with cool courtyards, views for miles, and interesting nooks and crannies like the pool, which is located in a vaulted crypt. The room was large and well furnished, including a mini fridge and large table for eating or games. The breakfast was great, probably the best we had anywhere. The restaurant was very good too, and probably the best for miles around. The servers were dressed in medieval costume and were very nice and helped us with the menu, which was not available in English. Had a traditional Bohemian dinner and it was great, very reasonable price too, about $45 for four including wine and the manager brought over an apertif after dinner. The location is midway between Prague and Plzn and ideal as a base to explore. Nearby is Hrad Tocnik, a true medieval fortified castle in ruins. It was closed when we went in March, but the workers let us in and we had the place to ourselves. Easy 25 minute drive to Zlicin where you can park the car for $2, buy a $5pp metro day pass and get into and around Prague.
The not so good news. You will have to carry your bags some distance from the car park and if you have trouble walking or climbing stairs, forget it. Also, the pool is very cool, but is included only as part of the "spa" and must be reserved in advance for $10pp per hour. I thought it should have been included, especially since we booked the largest suite they had.