I had a very comfortable stay at the Cozy bedroom/Kitchen suite. I lived there for a month. The location is literally 2 mins (walking) away from the subway, and very accessible and quite close to the city centre. John provided me with detailed directions to his place. :)
Buying groceries is not a problem if you plan to cook at home, there is a store very close by. The neighbouthood is peaceful, family-oriented and green. Some street noise was audible in my room though. The apartment doesn't have a living room/communal space, but I found the size of the room pretty reasonable and I had easy access to the kitchen area. Everything is exactly as shown in the pictures.
John made me feel very comfortable and at home. For most of my stay I was sharing the apartment with John's flatmate, who was a lovely person to live with. The rent was reasonable relative to other Airbnb postings, but you can definitely find more affordable places if you are planning a longer visit and can look for places while in Stockholm.