Very pleasant stay. I spent a week in Ben's place, came for a conference at Edinburgh University. The location couldn't have been better, I could get everywhere with a short walk. Grocery store 2min away. Ben and his daughter are welcoming hosts. Room is basic, but has everything you need, kitchen well equipped. Two things you should take into account: the bed is really high, with steep ladder, and there is no lock on the door. I felt that my privacy is perfectly respected, so it wasn't a problem, but I think it should be stated clearly, since it may be surprising.
Overally highly recommended for a nice stay in the heart of Edinburgh.