This was a fantastic find for us. We are a family of four who needed to stay just one night in Edinburgh before continuing on our travels. The position of the studio couldn't have been better and parking was easy (we parked overnight on the street for £14, but if we were staying longer there was a bigger car park nearby).
We enjoyed Grass Market, the Castle, the Royal Mile and Princess Street Gardens, Greyfriar's Bobby - and all within easy walking distance.
The studio itself was comfortable, clean and original! Very comfy beds. The shower could do with a bleach, but I guess that's just a result of the ventilation issues that a lot of these old tenement buildings have - the water pressure itself was excellent; great showers at the end of a very tiring day.
Communication with Pia was great; clear, helpful, to the point, speedy.
We stayed on a Saturday night and it was noisy because of its location and the revellers outside. My advice would be not to let that put you off, but if this is something that would bother you, take ear plugs if you're going to be there over a weekend. It didn't keep our children up, but my husband and I lay there thinking of our misspent youth!