Simon was a great host and provides us with a lot of suggestions about what to visit, and where to drink/eat. The neighborhood where the apartment is located is lovely and quiet, with lots of amenities close by. We didn't take any bus from there since we rather explored on foot, but seems very well connected to other places. It's in walking distance to Old Town and New Town (around 25 min).
Thanks again Simon, we really loved the apartment and it was perfect for a short stay to explore Edinburgh city!