This zoo had the vintage old looking zoo with a modern twist of the animal habitats. It was not your average animal in a cage look at the poor thing be miserable zoo. It had a little portion of its habitat. It is pretty big and spacious and we could not cover it all. It is one that you would like to go early in the morning to maximize the time. The zoo is located in the city and parking was easily accessible in the parking garage across the street.
I guess the only gripe I can say is that it did not accept visa or MasterCard. So count on taking cash if you do not have a German bank account with an EC card.
Overall I think it was by far the best zoo I have been to. I liked it even more than the San Diego zoo. But that is entirely my opinion.