NAC is a great place. I went there for CPL theory and CPL flight training and I have nothing but praise for them. The instructors all knew their stuff and they will do a bit of extra curricular flying like Mountain and Farm strip work which a lot of outfits seem to shy away from these days. The weather in Dunedin could be a bit of a downside to Mainland. It tends to be pretty settled in Motueka a lot of the time.
Being close to Nelson CTR and not a long flight to get in amongst all the cook strait and Wellington traffic is good experience too.
And of course then there's the Dodgy Ref Sports bar in Motueka, fantastic place to spend every night of the week
If thats not to your liking the Grumpy Mole in Nelson never fails to disappoint