The apartment is just as described, light and airy with great city views and had plenty of space for our family of 4. It was very quiet and we didn’t hear any noise from the neighbours.
Oslo public transport is fantastic (the router.no website is in English & the buses, trams & trains all have the next stop on a screen so you can’t get lost!) and buses and trams run all through the night, so it was easy to get to even though we had a late flight. Even the Sunday service is frequent. Although it looks a bit out of the centre on the map, the trip into the central station was less than 10 minutes on the bus and the flat is about 3 minutes walk from the bus stop making it a very convenient location. There is a small Rema supermarket next door to the apartment block and a slightly larger Coop 2 minutes walk away.
Of all the places I’ve stayed over the years, including fancy hotels, this is the first time I’ve slept in a bed better than my own and I was very disappointed when I got home!