We loved the apartment in every way. It was clean, spacious and bright. Nice beds too. Best part is the location at Grünerløkka, with Sofenbergparken right outside the door.
Future guest should take into consideration that there is no elevator or TV. But that was no issue for us.
The only thing we missed was perhaps a vacuum cleaner. If you're staying there for more than a few days (with kids especially), it might get a bit dusty so having the possibility to vacuum would be good. Also during our stay the internet didn't work. We were told we could use the network from other rooms, but it either was extremely slow or didn't work at all.
All in all, it was a great stay and we could come back.