We stayed here in early October 2022. Nice clean place with plenty of space and convenient access (easy walking distance) to both the central bus station and train station. The apartment is not situated within Edinburgh's Old Town, but is only a 10 minute (+/-) walk away. There's also a Tesco convenience/grocery store right around the corner.
Both bedrooms were nice- not mind blowing or anything, but quite adequate. The apartment has a nice, enclosed glass porch for sitting and relaxing.
David was very responsive to a couple questions we had relating to the unit.
Only "complaint" is the unit is referred to as a "garden level" unit, which means you walk down stairs from the sidewalk- not an issue on its own (though would make it inaccessible if someone has mobility issues.) The issue is it looks like there's a light to illuminate the stairs and entrance area, but it was not functioning when we were there; that made it quite dark (and feel a bit sketchy) when returning at night. I encourage the owner to get that fixed.