The apartment is located in a very nice, bohemian-chic, part of Oslo, but just "off" enough to be quiet at nights. It's very possible to walk to central Oslo, but buses and trams are close, frequent and take about 10 minutes to Oslo S (centralstation).
My favourite part of the apartment was the living room with all the records and the guitar. I stayed there by myself, but it's big enough for at least a couple and more than that if you're not averse to sleeping on the couch. The kitchen is quite small and really only seats two, but there is another table if you are more than that. Groceries were close by.
I really recommend Lars' apartment if you are looking for something affordable with a good location where you're also able to stay home some nights in good comfort!