Daniel's place is the perfect location to visit Stockholm, it is in a very cool area, yet the street where the apartment is on is very nice and quite. The main sites are within walking distance or easily approachable with public transport.
The apartment is a studio, and it could be perfect for a couple or a family with 2 small children, it might be a bit tight for 4 adults but definitely manageable. The inside of the entrance door is a large blackboard so be careful not to smudge it and get a bit of chalk on your clothes.
Daniel's a great host, very helpful and always quick to respond. We had a great time there.