We stayed here for one night on our way to the South Island. The accommodation was really comfortable, the heating turned on in anticipation of our arrival and lots of lovely small touches (little chocolates, lots of brochures on what to do). The flat does get cold in the evenings but there are heaters to hand to deal with this.
It's well situated and quick into town (5 min drive) and parking is just outside. I imagine in the summer sitting out on the balcony looking towards the lake would be very special. We'd definitely stay there again.