I visited about 7 years or so ago and went back 2 days in a row, as I enjoyed it, the buildings as have been mentioned where poor. If I recall correctly the Giraffe house was awful, due to a storage area above your heads the animals could only be viewed from mid belly down.
Though it was in early February and very wet and with snow and slush around. which is possibly why they were in doors.
The white rhino were labeled Wide Mouthed Rhino which was different, The troop of ring tailed lemurs swarmed every where and as soon as a delivery of carrots arrived on the back of a tractor they dived in and darted for the cafe roof to scoff the spoils.
The Australian walk through was good but muddy, and again the lemurs followed, ( it wasn't busy so they must have been bored) and nicked the food I bought for the emus etc, which are rather intimidating once they surround you with that drumming noise. I knew how Micheal Parkinson felt on his Emu encounter, not sure what they will do.
the tigers ran around the enclosure on their release at feeding time and one climbed a telegraph pole to grab it's supper from the top.
the Barbarossa's looked at home. the pygmy Hippos especially one kooked a bit off colour and staggered around a little the keeper said it was normal behaviour for him/her
One of the gibbons kept following me around the edge of it's enclosure with arms outstretched imploring me to pick him up,it turned out he as hand reared and sadly still craved human contact I know they have had problems there but i enjoyed my visits and would go again. the owner ate in the canteen and was giving an interview at the next table telling some one how they planned to bring in more tigers.
a nice touch for me was the rhino crate was on full view and you could walk around it and get an idea of the size of the animal as well as it's potential strength.
just my view from memory.
Dean