Very good location, a great home base to explore Oslo!
In terms of communication: Initially they offered to talk about the option of early Check-In. But when I asked about it a few days before my arrival, they didn’t answer me until the apartment was ready for (regular) Check-In. I had already assumed it wouldn’t be possible and there’s a great option for luggage storage at Sentralstasjon so it was fine.
Everything else was great!