Just left Ali's where me and my boyfriend had a great stay.
The location is brilliant - a 5-10 minute walk from Grassmarket/Cowgate for the pubs, and only slightly more into new town.
The flat is sandwiched between two clubs so Friday and Saturday nights were a little noisy but we were never disturbed. If you are a light sleeper do take ear plugs.
The flat was clean when we arrived and was perfect for two of us to use as a base - we only returned in the evenings to sleep!
Check in was easy as Ali has installed an outside key box so very easy for us to arrive and leave the flat.
One thing that really stood out though was Ali's communication. I've used AirBnB a lot over the years and have never had a host be so helpful as Ali- whether it be directions, recommendations for food or just Edinburgh to dos you were beyond helpful and made your flat feel like a home away from home for us. Thanks Ali!