The apartment is an easy walk to the city. We booked a late dinner and walked in and back no problem. I wouldn't bother with the bus, it was quicker to walk plus you can try some of the excellent coffee shops near the apartment.
The apartment block from the outside isn't much to look at and the block entranceway could do with a clean, it looked abandoned! Thankfully inside the apartment was excellent. It is clean and airy. It's a lot bigger than I thought from the pictures and the large kitchen/diner was great. Everything what clean and modern you could easily stay here a week. We loved it.
The only point is parking. We drove and when we arrived we couldn't find a place to park. It's a really busy residential street. We drove around and did find a place down a side street and after 4pm it was easier. Because this is so central and close to public transport we would fly up to Edinburgh next time and stay here.