Our experience in Dele's flat was great. It's bedrooms and living area especially are huge and the kitchen is a wee bit smaller but fully equipped and immaculately clean.
The best thing about the flat however is the location; it's about 10 mins away from Princes Street, the two stations and Grassmarket.
The only issue we had was that the boiler kept losing pressure and hot water due to some works happening in the building. We send Dele a message however and he responded in 2 minutes and was around in 10 to sort it out for us - can't ask for more than that!