I though that most of the Zoo was pretty nicely designed, and there is a work going on in several places to further improve things hopefully. The wildcat and lynx bit was very nicely done with a couple of enclosures for each.
@gulogulogulo 'I though that most of the Zoo was pretty nicely designed' this is a pretty selective view. I don't strongly disagree with you (I would substitute 'much' for 'most'), but I would never offer such an opinion without pointing to the various really poor parts of Duisburg (seals, bottlenose dolphins, elephants, Aequatorium).