The apartment may not look the greatest from the pictures but considering how expensive a city Oslo is, you're getting a good bargain and home base to explore from for the price.
located near a small supermarket down the bottom of the road and a bakery up the top, it also is near a number 37 bus stop that runs 24/7 I believe and stops at the end of the road every 10 minutes so travelling to/from the city centre is really easy.
There is also Jungel Pizza nearby which, many Norwegians I spoke to said, it is the best pizza in Oslo, and you're a 10 minute walk away from the Royal Palace.
The apartment, on first impressions, smelt a bit funky on arrival, but after opening a window and letting it breath the smell went away so possibly just from the last guests.
The beds weren't the most comfortable to sleep on and the pillows had nothing to them, small and offered no support to your head.
It was nice, that it includes a fridge, oven, hob, and the washroom had underfloor heating (presuming do to the washroom having no window)
Overall, nothing fancy and you get what you pay for but for what it is you can have a nice weekend break there. anything more like a week and you might want to look elsewhere if you value a good bed/rest.