We had an amazing time at Meret's place! Clean, tasteful, and truly in one of the best parts of town! Our trip was a bit complicated (different people arriving/departing in Oslo at different times, very early checkout), but Meret was always nice, responsive, and just made it work!
Access to the key is managed by some company, we had a bit trouble retrieving the key at one point due to an error in their system, but that's definitely that companies fault. But be aware things are more complicated than with the usual lockbox, especially when sharing the key.