I've spent 3 nights on an Edinburgh city trip.
Rui is a very kind, interested and open host. We had very nice chats in the evenings! But Rui also respects if you're up to more privacy - a perfect mixture.
The room was very nice, of good size and like the entire place very tidy and clean. I especially liked the bed - I had a very good rest in there. Rui also offered to use his kitchen. I preferred to eat outside, but I'm pretty sure everything would have worked fine.
The flat has been perfectly located for the sites I wanted to visit - very quiet though since located off the main road.
Bus Station is nearby, you can easily get to the airport, the bus station or into the city centre. It takes you no 10 minutes to the eastern part of royal mile, 20 minutes to the castle if you walk straight.
I'd definitely go there again. Thanks Rui!