Great 1-person apartment in the heart of Majorstua. The location is fantastic and I give both the apartment and the host (Odin) a top score in all categories.
A couple of things to be aware of: As is common in Norway, there's no A/C, so the apartment gets fairly hot on warm summer evenings. You'll want to sleep with open windows, and there's a bit of noise from the street below (Kirkeveien) so I suggest bringing ear plugs and eye shades for sleeping.
The apartment is on the 6th floor. There is a one-person elevator which doesn't inspire a lot of confidence, so I opted for the stairs after using the elevator once.
The kitchen comes well equipped for making a simple meal or re-heating takeout food. There are several local restaurants providing pretty good takeout. The internet connection was great.
FYI there's no TV in the apartment. Not a big deal, but I missed it while reading the ad initially.
I'll be happy to use Odin's apartment again if I'm in the area.