To get the most important thing out first: this is one of the best places you can come to when visiting Oslo.
Apartment: It's the home of a young family so the building feels lived-in while still very stylish (instead of that certain hotel room aesthetic in certain other apartments). All the basics are there, but what elevates this are all the small details the hosts have put attention to: flowers all over the apartment, soaps and shampoos by Rituals, bathtub, roof terrace and lamp by Artemide (my mother's favourite).
Location: It's located next to good connections by bus and tram, and everything Grünerløkka has to offer: cafes, restaurants and specialized stores you don't find elsewhere.
Process & Hosts: This was my parents' first time at an Airbnb and they got the best possible introduction here - communication with the hosts was fast, we got handed the keys after a small tour in the apartment and on top of all this, there were even some coffee bags on the table waiting for us when we came (the hosts knew what Finns really need!)
If we are visiting Oslo again, we'd love to return here - while we were this apartment's first Airbnb guests, after such an experience we won't be the last ones either.