I spent one night at Kathryn's and her welcoming is fantastic. You immediately feel at home. The house is immaculate, the bed is very comfy, the breakfast is gorgeous. All is done for your well being and even her english is perfect. You won't have any problem with her accent (very often in NZ, french people have a very hard time with the local accent !).
She has been living in Tauranga for more than 25 years, she likes hiking and cycling and knows perfectly well all the surroundings. You can trust her when she gives you tips for visiting.
I highly recommend Kathryn's house.