We only stayed one night at Dianne's and it has everything you need for your stay, the little kitchen was great. We didn't meet Dianne at all but communication was easy and there were no issues.
My only reservation about the place was that it was very dark as it's under the house, the 'lounge' is totally dark as it doesn't have windows so you need to turn on the light. There was also a fair bit of noise in the afternoon from the kids running around upstairs but it was all quiet when we were going to sleep which is the main thing :-)
So just be mindful of the fact that staying underneath someone's house has disadvantages (although I've stayed in places where it was the opposite - light, airy and quiet!)