This is a small room with kitchenette in a hotel. There is a staffed front desk, and you check in directly with them.
The host never replied to my message asking whether check-in would be staffed on Christmas day, when I was due to check in--but it was indeed staffed.
The room was different from, and slightly smaller than, the one pictured. Access to the bed was tricky for the second person--the far side of the bed was against a wall, and there was a platform blocking the foot of the bed. The room itself was fine, with some nice touches (e.g., milk in the mini-fridge), and it was clean. The location was very convenient to old town Edinburgh.