Staying at Heidi's apartment was really a good experience. The place is located 15 minutes from the city center by metro in a really quiet neighborhood surrounded by lakes and forests.
Heidi is really a friendly host and very helpful in giving tips on nice spots to visit in town and the surrounding area and was a pleasure meeting her.
I was also lucky to have Heidi's apartment for myself completely for a couple of days :-)

I highly recommend Heidi's apartment for any traveler who would like to visit Oslo and have and stay in a relaxed clean and welcoming place:-)