The location and the neighborhood are absolutely phenomenal. We were there for a month and I can honestly say it's the best neighborhood I've ever lived in. Half-a-dozen great cafes and coffee shops within a few blocks (Don't Tell Mama, Modern Standard Coffee, Comb, etc.), several great bars (Cloisters, quiz night at Home Bar), two blocks to a full-size grocery (Scotmid co-op), three blocks to the Meadows, short walk downtown, restaurants (Sora Lella, Indaba, and Maki&Ramen were some standouts). Just amazing. I've visited Edinburgh half-a-dozen times for work, and this was my favorite place.
Everything else about the flat was great. Responsive host, good kitchen setup, nice shower, etc. If you do a lot of cooking note that induction hobs/stoves are idiosyncratic in some ways, but all the appliances have instruction manuals in the cupboard. At any rate, I was happy with everything about the flat, but the location was really what made it stand out.