Lars place was beautiful,very close to the center . Tram,buses are everywhere around apartment but we prefer walking ,so we went all around Oslo like that . There are few grocery stores near like few min away ( kiwi,rema,joker ) those are one the cheapest here . You have few pizza places around but my suggestion is to cook your own food ,Lars kitchen is very well equiped. There is everything what you need for life in the apartment . Very important is garbage separation ,this is what I liked a lot here! Also great thing is floor in the toilet ,awsome ! We visited Oslo few days ago and it was not so cold . We are in love with the place and would reccomend Lars apartment to everybody!
Beggining of our vacation was terrible ( flight delay...long hours on the airport ..) but we had very good communication with Lars and instead of arriving at 2 Pm we reach Oslo at Midnight ,but we found easily apartment . One advice if you want to stay on budget AVOID TAXI ! :)