We booked here at the last minute, and we were very pleasantly surprised at how nice the apartment was. We had a small studio at street level, but it was more than enough room for the two of us. I was worried about street noise, but there was very little traffic during the evening, so no problem at all.
The apartment is very well fitted out, and there are many thoughtful touches. For example, the toiletries provided are the brand Neutral. This is not fancy or expensive, but it contains no perfumes and no colorings so no guest has to worry about an allergic reaction or sensitive skin. Coffee (instant and filter) and tea were provided along with basics for cooking (oil, spices). The beds were very comfortable! So much so that I would love to know where they come from (we live in Iceland).
There was also a really good guidebook showing how to use all the equipment in the flat, ideas for things to do, and places to eat.
It is clear to me that the owners here want to provide the very best and they really care about the happiness of their guests. Many flats for rent or hotels in Iceland are just seen as money makers, one gets the idea the people running the place never actually stayed there. This is the complete opposite -- the owners really want their guests to have a great experience. Excellent value for money, and really look forward to staying there again some time.