Martin's place combines a perfect location right in the heart of Oldtown with a cozy, private flat with natural light and a really pleasant feel. The location is perfect for a stay - you're less than a 10 minute walk from either end of the Royal Mile (Hollyroodhouse or the Castle) and there are restaurants and places to eat literally everywhere. There's also a grocer about two doors down for anything needed.
The flat itself was cozy, with a ton of natural light and comfortable amenities. Really pleasant. I spent an afternoon just reading and drinking coffee in it rather than going out because it was so pleasant. Only downside - the mattress of the main bed is quite hard and squeaky, so if you have back problems or anything of the kind, could be a minor challenge. Martin is a great communicator and proactively reached out to us to make sure everything was clear.
Overall - highly recommend. This is a great place to stay for a visit to Edinburgh!