I stayed in this apartment for a few weeks. It is a super nice, barely-lived-in apartment in Majorstuen right next to the train station.
It's a luxury apartment with nice new appliances. The dishwasher, washer/dryer, stove, and fridge are large, new, functioning, and great for long-term stays. The blinds are controllable with wall switches. The WiFi was is fast (>50MB) and stable - I never had a drop or issue with it.
Majorstuen and the apartment are in a great spot for longer visits. You're a short train/bus ride from the city center in one direction. And you're a short train/bus ride from mountains, hikes, or a golf course in the other direction. There are also ample choices of grocery stores, coffee shops, and anything else you need within a 5-minute walk. Finally, Frogner Park is a beautiful famous park that's immediately adjacent to the apartment.
I highly recommend the place.