Overall, a budget option that is worth it, if you want a no frills stay. Big room, adequate facilities. Here are the Pros and Cons:
Bathroom has a heated floor (!) amazing after a cold day out.
The room was very clean
There is a stove and a refrigerator in the room
The building is very close to bus and tram links and 15-30 minute walk from the centre or waterfront
The is a convenience store literally next door that can be accessed through reception.
There is cheap tea and coffee at reception
There is no wardrobe or drawers in the room, we had to leave our clothes in our suitcase.
There is a fee (60NOK?) for bed sheets and towels. The bed sheets (they go over mattress) are also mandatory so you have to pay the fee. Pillows and duvets are provided in the room thankfully.
There are no facilities in the room such as kettle or hairdryer, to use these or any cooking equipment, you have to leave a 100NOK deposit with reception and you have three hours to use in order to get deposit back. This actually isn’t a bad system but for two of us to have a shower and dry, three hours was cutting it fine for hair dryer use.
The last ‘con’ is subjective but the place is so sterile looking, it could be a hospital. There is no art, no wallpaper, no colour at all. Everything is Grey and White. It would have been nice to even see local photography of Oslo in reception but it is very plain.
The staff were incredibly nice and helpful and cheerful, big thanks to them!