Grant wasn't there while we were in Edinburgh, but he gave us all the info we needed and we received a warm welcome from Fanica and her husband. The flat was beautifully clean, well equipped, comfortable, light and airy. Especially nice touches were the very soft towels, shampoo and shower gel in the bathrooms, tea and coffee in the kitchen. Off-street parking was a huge bonus, as was wifi.
It's in a brilliant location, within easy walking distance of pretty much everywhere central Edinburgh. Of course, that does mean it can be a little noisy late at night with happy revellers - especially if it's warm and the windows are open - but that's to be expected, especially during August in Edinburgh. You'd probably have to stay in the Trossachs if you wanted somewhere quiet!
We loved our trip and would come back to stay at Grant's flat in a heartbeat.