Nothing really, only I would have liked a small fridge in the room, but this was not essential for me. I definitely stay there each time I visit Edinburgh. Thank you for making my visit perfect.
Everything. Location is great, easy to find, center, 1 minute or even less from Royal Mile street, 2 minutes from Princes street, waverly station, and waverly bridge where you can take the city tour bus, and also take the bus number 100 to the airport ( Bus is every 10 minutes, takes only 30 minutes to Edinburgh airport with free WiFi on the bus). Lots of restaurants, cafes, and bars around, plenty to choose according to your taste. Double room is a good size, very clean, very modern, got free tea and coffee facilities, free wifi with good speed, bed and billows are very comfortable, bathroom a bit tiny but had no problem with that. Staff is increadibly friendly and helpful, they answer all questions and really give plenty of information about the city or transportation. If you need a drink or a meal (24/7) you need to bring it up urself but I had no problem with that (felt at home).