Morten's cabin is beautiful, situated in a very nice spot to see across the fjord.
You can even see the ski jump. There's tons of hiking spots hidden around, we found a path that lead to Solvik beach, which is a lovely little beach, we had a great time jumping into the fjord and swimming around and exploring the area.
There's a nice little cafe a little further down for when you get hungry.
The cabin is very well located to do all the majour tourist attractions, as it's just a 15 minuet bus journey to Oslo city centre, and then from there it's a 10 minuet bus ride to radhuset, where you can get a ferry to do the Viking ship museums, Fram culture, kin-tiki, and holocaust museums.
Equally, we found using the Oslo pass that we could go to the palace grounds, sculpture museum and to the very top of the ski jump. The ski jump was the furthest attraction we went to and took us just under half an hour. Using a combinations of trains and busses.
The island the cabin is on gave a full day of exploration and I'm sure there was a lot more to discover that we missed! So the island itself is an attraction.
Morten hospitality was amazing, he set us up with everything we needed to stay comfortably! And it seems a real shame to leave it behind. But we'll be back!
The only downsides I will mention is that being an expensive country, and us having not been prepared for just how expensive, we had to ration our money, and as it is self catering, a lot of money went on food! Luckily having bought the Oslo passes we saved ourselves a lot of money and got by okay for four days! And another down side is that we didn't get to stay here longer!