This was the second time we stayed with Mona and Luisa, after coming back from a few days in Svalbard.
Our flight got in late, and we didn't get back to Mona's until much later due us making a stopover, and then getting ourselves lost in Oslo. Despite all this, Mona was always accommodating, and waited up until we arrived back at her house around 11pm. The neighbourhood is safe, and is easily accessible by public transport.
Hope to stay there again next time we visit!