We had a great time in Marius' apartment. It's a beautifully designed and spacious house with all (high quality) facilities you need. We stayed with 2 families. The kids had enough space to play and there were plenty of toys available for them. The house also has a garden which we didn't use because we stayed in February. We only spent 1 night because we were passing through but it's such a nice location (right in the center of Oslo but still very quiet) that we could easily have spent a couple of days more to see the city. Marius was very friendly and responded very quickly when we had a question. I'd highly recommend Marius' apartment!