I visited for 3 nights on a work-related trip. Ian was very welcoming, and the flat was clean and very well decorated. Although Morningside is a good 30 minutes walk from the city centre, the area is lovely with amenities at the doorstep. There was fresh bread, milk, tea and coffee and a very well equipped kitchen which added a nice touch. The kind hosts also intervened very quickly to clear an unwelcome spider (very common in Scotland when the weather gets warmer) to my great relief!
Overall, highly recommended!