This exhibit is the equal of any goanna enclosure I've seen.
It seems like Bredl's Wonder World of Wildlife has a very variable level of quality from downright ugly (the lovebird cage) to excellent, like the above.
Bredl's Wonder World of Wildlife has been upgrading exhibits over the last few years - a slow process considering they are a family-run business. The lizard enclosures have all been rebuilt and a new Dingo enclosure was finished and occupied in the last week or so. Wetland areas are being established in the park to attract native wildlife and many of the lawns will be replaced by native plants.
The lovebird aviary is similar to many backyard aviaries. It is adequate for the occupants for the time being.