- Auckland is not walkable. It's very spread out, and the public transport is awful, so it's not practical to visit many places without a car. It probably helped that they had friends with an apartment overlooking Herne Bay, but that's a pretty expensive neighbourhood; most of us couldn't afford to live there.
- They didn't see a Target or Gap because we don't have them, but NZ certainly does have McDonalds, Burger King, KFC, Subway and a few other multinational fast food joints. They must have been amazingly lucky to avoid them - I'd think it'd be a pretty hard trick to plot a journey that didn't run into any of them.
- You can actually get tomatoes at any time of the year.
A lot of the reasons I left were work-related, which they wouldn't see from a ten-day holiday. Even in Auckland, interesting IT jobs are rarer than you'd like; 99% of the jobs I saw advertised looked to be soulless C++/Java/C# forms-based applications for some internal business thing.
Money's not great either; despite paying a lot more on rent in London now, I'm financially better off than I was in Auckland. Salaries are higher to counter the rent, and most of the rest of the cost of living is not a lot different. Some things are much cheaper; books, for example, cost a fortune in NZ (weirdly, milk as well, despite all the dairy farming).
The nightlife is okay in Auckland but a big pain in the ass to get to/from, unless you can afford to live nearby. The lack of public transport really bites here.
I like the place overall, and I'll always have a soft spot for it, but there's another side to this story that I think they're missing.