This apartment met all our needs during our stay of 5 nights. It is a unique and cozy apartment and had pretty much everything we needed to be comfortable. My 6 yr old son and I have food allergies so we needed a place where we could cook our own food.
The lower basement level where you sleep is really cool; not much airflow down there but it is perfect for those 20+ hours of day light. The bathroom is also on the lower level with a nice shower with plenty of hot water and good water pressure. There were generous numbers of quality towels, the bed linens were clean and, more importantly for me, the bed(s) were very comfortable.
On the main level, the kitchen is basic but adequate and fully functional to be able to prepare meals. In the living room the sofa was more worn out than in the photo but the room is bright, sufficient size and nicely decorated with fascinating books about Iceland. If someone is planning to sleep on this mail level, there is nothing to block out the light which might be difficult during the extended light in the summer.
Overall, we had no issues with this apartment and really enjoyed our stay. The apartment was clean, the beds were comfortable, the location was awesome, easy parking and the owners were easy going (as most Icelanders are), friendly and helpful. We'd definitely stay again.