Loved our stay in Oslo at Carlos. Apartment is in the heart of Grunerløkka, very nice part of town. Everything is withing a walking distance: the center, the parks, the restaurants, the grocery stores, and the tram stop is just 3 minutes away. We arrived at the Central station and got to the apartment by the tram, within about 10 minutes. The apartment has a fully stocked kitchen, washer and drier, three spacious rooms. It was so-so much better than cramped hotel rooms we've been staying at.
Carlos lives in the same building which also gave us a piece of mind.
If again in Oslo, we'd gladly stay at Carlo's again.