I stayed at Sally's flat for about 3 months and a half as I was studying in Edinburgh.
The flat was always clean, the street was very calm and the supermarket was close by. Also, there are two buses that go to the town centre and they are only about 2 minutes walk from the flat. They each come by every 15 minutes so you'll never have to wait long before one shows up (and they take about 15 to 20 minutes to reach the centre).
Sally's indications were very clear and she even had a little book with emergency numbers, doctor offices close by, dentist but also restaurant adresses and suggestions for free activities.
Sally answered all my questions and she was very reactive (once there was a leak in the shower and she got it fixed immediately).
Moreover, Sally was really nice and she let me made full use of the kitchen, the living-room and the washing machine.
I would really recommand for you to stay at Sally's (however I do need to warn you that if you have back problem the mattress might not be ideal for you).