Great location! We walked to most everything and there are two grocery store options literally steps from the door. There are many restaurants and shops in the neighborhood, as well. We felt like locals :)
There is a tram stop very close by, which is handy, but also brings a bit of street noise as people get on and off the tram.
Check-in and out was very easy. The building is older, but has an elevator. The apartment has very high ceilings and is charmingly decorated. The host's personal belongings are there, but there is dedicated space for guests in the closet and kitchen cabinets. We had plenty of space for our things.
This was a great place for our first trip to Oslo!