It was a brief but a perfect stay. Robert assisted me the very second I had a question and he was very friendly. He kindly offered me comfort food, which was great. It might not be a big place but the host makes sure it's cosy, more than enough to feel like you're like home.
It's situated in a very logistic place (really close to the Oslo Stasjon and many other points of interest) and it has all you need nearby, otherwise Robert will offer to help you or give you the best directions. He speaks perfect English and he has a joyful and likeable personality.
It was a good call to choose him, undoubtedly I will book his Airbnb again when I stay in Oslo.