Steffen, he is very good host, he greet us when we arrived, explains everything's about his place. Good communication give all information.
The apartment is 20minutes walk from oslo train station. We have try to walk just following the tram line number 11 , 12 or 13 it pass this way so if you need get on the tram no need for long wait.
Few supermarkets near by so you can buy ingredients and cook your own food as in oslo food are expensive. A lot of local shops and restaurants. The apartments is 6th floor roof top so is nice view , have lovely balcony to enjoy in the evening. Only down side of this place have no lift but we were fine to walk up and down.