Stay at Millie's place - it is wonderful. I would happily live in Millie's place. It is perfectly situated only a few miles from Rotorua.
The house itself is wonderful, with immaculate gardens for you to enjoy. The rooms are spacious, even more so than the photos show. It's light and peaceful. Actually, Millie's place was so good to be in that we were tempted to skip seeing Rotorua for a day at Millie's.
Communication was great throughout. I'd definitely recommend staying here.