My wife and I stayed at Diane's place for an entire week and we loved it!
We found it to be everything it was advertised to be, including cleanliness, comfort and location. Although it is connected to her house, the private entrance makes it virtually the same as any stand-alone place.
The apartment had everything we needed and more. We were centrally located to everything we wanted to do and it was a short 15-20 minute ride from airport.
We highly recommend Diane's place when visiting Maui