SUCH amazing views! If you're a fan of nice views and central locations, this is the place for you. Honestly, we didn't even do one of the sightseeing options since we realized our view from the apartment was probably better than that one! Coming from hotels, it was also nice to have so much space being a studio. So central to most anything tourists would want - we walked everywhere (even a bit out of the tourist area for dinner one night) and it was so easy to get around. Nothing was more than a 30 minute walk and most things were 15 minutes or less.
Jo was incredibly easy to work with - she sends you a keypad code right before you get there and you just use that to enter each time. We had some questions about the heaters (not like North American heating systems) and she answered my call right away.
The one thing I'd note, is that while it's shockingly quiet from where you enter on the Royal Mile below, you do still get some street noise (largely people coming home from bars at night and a distant bagpipe - ambiance :)). I'm a really light sleeper, so I had searched other reviews about noise and saw people say they didn't hear anything...that definitely wasn't the case, BUT it also definitely wasn't enough to keep me up or wake me up ever. You're truly right in the thick of it, so it's to be expected! Very peaceful city locale I would describe it.
Also - it's true - the stairs aren't a joke (especially with big bags like we had). I think there were 72 in total. But, for us without mobility issues, it was well worth the climb for some privacy and a great view. Would definitely stay here again if I wanted to be right in the Royal Mile zone!