Robin's place was in a great location, close to the Meadows and a short walk to the city center through the park. The pull out couch sleeps two people easily, its a bit uncomfortable but doable for a few days. I would say if you have 4 people or more this may be a tight squeeze for you, especially with luggage. The bedroom is very small but there was a clothing rack which was helpful for hanging stuff up.
The bathroom was nice and large which is not always expected in a flat in the UK. The shower pressure was not great but it got the job done. The kitchen was a good size and equipped with everything you would need for a short stay (toaster, french press, etc). I do not think there were any bathroom amenities though so I would definitely bring a hairdryer.
My only complaint is that the apartment smelled a bit damp. I understand as it does rain a lot in Scotland but the shower towels and even the bed linens for the living room smelled a bit musty which by the end of our stay was really grossing us out. Everything also felt a bit damp which was just uncomfortable.
All in all, it was an enjoyable stay - the apartment is cute and convenient, especially because it is on the first floor and it will sleep 3 people easily.