We (3 adults) had a very good stay (one night) a Maruia Motel. The host was very friendly, welcoming and greeted us with his little son in bis arms. :) he provided us with some info about the area, too.
The room (1 double 1 single bed and a kitchen in the same roome) and seperate bathroom were very clean a well-equipped! Very soft and modern bed linen, towels and even nature-friendly soap! :) we brought our own food, but coffee/hot chocolate and little milk were provided in the little kitchen niche of the room.
Definitely Recommended for a stay while travelling to/from Christchurch-Westcoast.