Be prepared for queues for days as is becoming increasingly common in the NZ Post stores now. The parcel drop off is a huge help but if your parcel is bulky and won't fit you could be queued for 20 minutes for just a simple drop off. The prices seem to go up every year as well.
Always good service at this post shop, is combined with kiwibank and sometimes the queues get pretty long at busy times, they could do with having a few more counters open during these times. It's in a handy location in town, the car park round the back I find good for parking if you're just running in as it's a 5 minute park. Staff are always friendly and helpful and offer advice about which is the best value for your money with the post bags