My family of 7 recently stayed in Carl's apartment and had a fantastic time! Prior to our trip, I emailed Carl a couple of times with a few questions and he was always quick to respond and helpful. Check in also was super easy with Carl meeting us at the apartment and showing us around.
The apartment is a good size with 4 very spacious bedrooms. And despite being on a main thoroughfare, above many great restaurants and shops, we found little noise disturbance.
One of the best things about the apartment is that it is very conveniently located directly above a bus stop. We did have two rental cars with us (which we were always able to secure free parking for around the corner), but it turned out to be the case that taking the bus which passed quite frequently was the best way to get around. We also often walked to downtown Edinburgh- thats a good 20-30 minute walk, but theres plenty to see along the way so it was always enjoyable.
We had a fab time and already miss Edinburgh!