Malmoya island is a beautiful, almost idyllic place to stay. The island is very pretty and there are a couple of small pebble beaches nearby which you can walk on. You can easily cycle into town with the man and woman's bike that is available. Cycling through the three tiny islands towards Oslo centre was beautiful and later along a cycle path (though the last part of the cycle path is along a big main road) - takes 25 minutes if you are fairly fit. That busy main road is not so nice! Cycling can take a little longer if you are not so fit. There is also a bus about 10 minutes walk away which goes into the centre of Oslo. The studio itself has everything you need, including cooking facilities and microwave. The shower room was very nice. With a good hot shower. And there are two small balconies one of which has a sea view. The only thing which would have make it better for us, was that we missed having a sofa.
The studio is actually on the top floor of Brigitte's house with its own keypad entrance. So the studio has its own access from an external metal staircase. Brigitte was friendly but we didn't engage much as I think she was busy with guests. It's was a lovely green place to stay, away from the noise and bustle of central Oslo. And you will have no problem with this booking.