That's really nice. It reminds me of Willowbank's one but smaller with heavier construction. The aviary frames look pretty distracting in the photo. Perhaps not in real life though?
Here are a couple of other kea walk-throughs, albeit both old photos. Willowbank's still looks good in real life (although the photo below was taken in the rain), but I haven't seen Orana's since I took the following photo when it was just newly-opened. There used to be better photos of Willowbank's one in the gallery but they got Purged.
I saw this aviary for the first time the other day, and uploaded a photo almost exactly the same as this (standing at the entry - it's difficult to get a full photo of the interior from other points).
It is a nice aviary, but a lot smaller than I had expected it to be. I think that's because it is nowhere near the size of the ones I'm more familiar with at Willowbank and Orana Park. It is certainly a great deal bigger and better than any of the other ones I've seen though, at places like Queenstown, Staglands and Nga Manu. (EDIT: I forgot the one at Te Wao Nui at Auckland Zoo, and I'm not sure if I'd put that ahead of or behind Wellington's because I've only seen it once and that was a few years back).
The roof seems low in the photos and the framework a bit overbearing, but neither are particularly noticeable in real life.
The kea were very subdued (I think just because it was pretty hot that day) so most people I saw simply walked through without stopping because they couldn't see anything immediately.