Probably biased but my vote is NAC. I was treated like a student, not just a number. Staff are friendly and helpful, even sociable outside of the college. Probably the best flying location to train, everything is very close, controlled airspace, mountains, ocean etc, scenery around that part of NZ is amazing.
Motueka is a small town, everyone knows each other, got everything you need to survive and a few good pubs too! Some lived onsite (pretty small rooms) others rented or flatted nearby.
Couple of negatives: Night flying, while it can be commenced from Motueka (Take off before ECT) you have to finish in Nelson, which means you need to arrange a ride back to Mot (if you live their) afterwards. Next morning you need get to Nelson early and fly the plane back to Motueka. It's a short flight 10-15mins, but it's a 40min car ride between the two places. IFR done out of Nelson, so after CPL, you'll find yourself needing to relocate unless you don't mind driving.
Anything else or you want to discuss further, send me a PM.