Klaus was a great host, very talkative, he helped us for everything and answered very quickly everytime i asked for something by email.
The appartement is really clean. Everything is perfect and you can enjoy a great balcony (the 5 floors without lift are worth it).
He live with a roomate who is really discrete and quiet.
Norrebro and the flat are not so close to the center if you don't take buses/train. We walk a lot everyday.