When you plan on visiting Oslo do yourselves a favor and try to stay at Kristiane's place. The shared appartement is well-equipped, spacious and very clean. It is located in a charming neighborhood from where most sights of Oslo are easily reached with a short walk.
Additionally Kristiane is the perfect host as communication prior to and during the stay is very pleasant. Kristiane helps with tips on where to park, where to go or what to do in Oslo. Whenever I come back to Oslo I'd definitely stay at her place again!