I had a very pleasant time at Camilla's. Everything was clean, the room was nice and comfy (especially the kingsize bed!), the kitchen well-appointed and clean, as well as the bathroom. Camilla herself is very kind and helpful. Really nothing to complain!
The place is somewhat off the beaten track, there are no restaurants or cafés nearby. But the bus stop is only 3min away, the metro maybe 7-8min (the public transport in Oslo is superb and easy to manage!). From there it's about 20-30min to the city, so it's well-connected to the centre and the main streets.
I would definitely recommend the place, all in all it's a very good deal and a nice base camp to enjoy the beautiful city of Oslo!