If you want something relatively cheap and convenient this is great. Its very close to the centre of Oslo which makes getting round super easy. the apartment itself was decent with everything you could need.
The downside was the surrounding area. when we looked outside our window, we saw a dilapidated building with a smashed in window. Not very pleasing to the eyes to say the least.
Overall I would still recommend this as a place to stay when visiting Oslo. The surrounding area isn't something that the apartment providers can fix so it may be unfair to criticise them for it, but I felt it was worth mentioning.