I stayed at Diane's house for 3 months.
Diane was great! She is flexibale, communicative, friendly, helpful, and always ready to answer all my questions (waht should I visit in Edinburgh, which restaurant, pub is the best, etc).
The room was clean, big and bright, whit a huge window facing Diane's cute garden. The room has two radioator, so it can be really warm during the cold months, a huge wardrobe, with plenty of space, and a big mirror. The bathroom and the kitchen were also clean, big and well equiped.
The city center is easily accesible within 15 minutes from the house, with public transport, or 30 minutes by walk. The neighborhood is a mixture of young families and old people, so it's really safe and lovely. I'm a light sleeper, so I loved that the nights were quite.
To sum up: I'm really glad that I booked Diane's room for this 3 months, and I would definetly recommend to stay at Diane's even for a few days or longer term!