I planned to visit Olso for ten days, so I needed an apartment that was at the same time comfortable and not so expensive. The Ola's flat was perfect for that!. The apartment was a great place to stay. First, it was very easy to get to central Oslo using the tram(17) or bus lines (31) in 10-15 minutes. Also, you have the grocery store (Rema 1000, which I do recommend, as well as Kiwi) within couple minutes of walk.
The apartment itself is great: cozy, clean, comfortable and fully furnished with everything you need. It has also a project and sound system if you want to chill and relax after visiting the city all day!.
I would definitely recommend it!