My girlfriend and I've been at David's place for 3 days. The house is really nice, the master bedroom has a private bathroom and all the privacy you need. Dave is a very kind host and gave us a lot of tips. The view from the balcony is really something and also the neighborhood has a lot to offer. The Old Town is just 20 minutes far by bus and it's well connected, so don't be afraid of the distance.
For us, it was a positive experience and if we'll never visit Edinburgh again, this place will probably be the first one we'll check.