I brought my teenage son on a trip to Iceland, and we desired to stay in an apartment versus in a hotel. I am so glad we did! The Downtown Reykjavik Apartment was absolutely perfect. Beds are extremely comfortable, the kitchen was quaint, highly functional and well-stocked (thank you for the much-needed coffee!), and the location was absolutely perfect. It's easy to walk everywhere in Reykjavik, and this location was central to everything.
The hosts were extremely accommodating and allowed early check-in and late check-out (something they are able to do if there are no renters on either side of your stay). They left us a little gift of Christmas oranges, which we were thankful for! Also, each time I emailed with a question or request, they were very responsive and accommodating.
The ONLY drawback was the noise. The street on weekend nights can be a bit loud... people being a bit rowdy after a night of drinking. But that's not exclusive to this apartment... if we had stayed at another apartment two blocks over, we would have experienced the same. There was construction occurring in the building, so a couple of days we were woken up by hammering and sawing. But again, I think this could occur anywhere, in any apartment building. We just happened to time our trip to coincide with some building remodeling!
Overall, we were exceedingly happy with the apartment and would definitely hope stay again if we return to Reykjavik.