- Most things are expensive and lower quality than you are used to. Furniture, housing, food, etc. Simply because of isolation and logistics. - Poor job market, terribly poor for most people. - Which leads to rules making it much harder to move to NZ long term. Unless you meet some high bars (several million dollars in the bank or married to a kiwi, etc.) it is hard to get permanent residence there.
On the other hand, it is one of the most beautiful and rugged countries in the world. An unlike Australia, every plant and animal is not actively trying to kill you.