The location of the flat is very nice, because its away from the usual tourictic quaders of Oslo. You will find a nice parks and many playgrounds that can be reached by a short walk. However, the flat is very small and - to our impression - not really suitable for 4 people. Especially, since storage room for clothes and stuff is missing. But, for 1-3 people its OK.
The flat was easy to find with the description Trude give.