We spent a few hours there in lovely weather. Gardens are splendid, people care a lot there. Castle itself is nicely reconstructed from outside. We skipped the interior part this time as we were there already in the past. We visited though the show with birds predators. Almost one hour show with experts, really well spent time. We recommend to visit this place.

Be prepared that nobody speaks English and the staff is not helpfull or friendly.
It is a shame that they do not have tours in foreign languages. You cannot visit on your own, you have to join a group! And the groups run in Czech language. Welcome! ;-)
We participated in a group - one third of the people were foreigners - and the guide said only once sentence in English "do not sit on the furniture". Fantastic! Nobody cared about us.
They gave you some some brochures (sticky pages in a shabby folder) in German/English and you can read, that is all. Come on people, this the 21st century!!!
The castle looks really nice but to be honest the owner (Czech Republic, I guess) does not deserve to run such a nice place with Czechoslovakian communist tourims style. They do not know anything about tourism, professionalism completely lacks.

The chateau is beautiful but crowded during the season - be prepared to wait, so if you want to go inside just go buy tickets, get reservation for the guided tour and then go to the gardens which are really beautiful and worth seeing.