Not the worst cat enclosures I've seen, but definitely not the best either. Very small, not very good looking but luckily they're pretty green, making the experience better. The lions have a better exhibit, the classic "island" separated from the public by a moat and a concrete wall.
I did not own a camera back when I visited Plzen, but they answered my e-mail really quickly, agreed to meet me that day, and even though the curator was not there, his colleague, who didn't even know I was coming, accepted to bring me off-show and to show me around. I was also allowed to stay on my own back there, keepers were not far, preparing food for the animals but still, I could move between the rooms and take a look at the species without anyone looking over my shoulder. Also, sadly I don't speak any Czech so communication was a bit hard, but they were happy to help me find species I was looking for. Highlights were the Panay cloud-rats, the most agressive Leopard cat I've ever seen and the many nice birds (Maghreb magpie, White-eared doves...). I was also gifted the yearbook with a complete stock list of all the species they have.