Chiming in here...
We stayed AKL concierge over New Year's of 02 - 03. Talk about burning up some points! But, it was o-so-worth it!
We were on the 5th floor, and had a bit of a walk to get to the concierge lounge (Kilamanjaro Club, methinks.) But, we overlooked the main savannah, and there was plenty of wildlife to watch - giraffes, zebras, all sorts of antelope and what my daughter called "cow-y things." One of the antelope breeds (don't have the name handy, sorry) was so close to our balcony that you could hear their knees "clacking" when they walked. And, with the artifical moonlight illuminating the savanna at night - well, it was all pretty special.
I felt the service in the lounge was just fine. Only one odd thing - while there were plenty of beverages available, you had to ask an attendant for soft drinks. No big deal.
There was a congenial, family feel about the whole area, and the concierge staff was tops, calling us by name and taking care of any details.
Heck, yeah, I'd do it again.