Great spot - Kina beach across the road is magical.
There are indeed others in the small campground, of which this house is a part. Camper activity, comings and goings, including cars and camper vans, the sound of the hot water shutting on and off right outside the master bedroom as other residents take showers. For this reason, I don’t think this represents value for money.
That said, the Bach is a unique kiwi experience - like time travelling back to NZ 1950s, but with a modern kitchen and workable bathroom. Kick your shoes off and breathe the salt air. It’s wonderful.