What did we like? Room provided 2 twin beds and 1 sofa bed for 2 that were comfortable. It has a good location that allows you to walk to the main streets of Reykjavik.
What didn't we like? Entrance displays the need of maintenance. Bushes are overgrown and paint is past due. When we entered the Guesthouse, it was smelly. The room assigned to us was downstairs and if you do not turn on lights (which initially you have no idea where they are), you will not be able to see much.
Multiple showers like a dorm. I was not comfortable bathing alone since it seemed so spooky.
Overall, in our travel, we stayed in 5 different locations, and this was by far the least that we liked. Not returning and would not recommend.