The apartment itself is great. Very modern, very clean, everything was in working order. There was a small amount of various amenities for the kitchen like salt, pepper, and sugar but no coffee for the coffee pot (didn't expect there to be anything just letting others know). The location is great, very walkable to shops/restaurants/bars/tourist attractions in Reykjavik. There is street parking in front but we were almost never able to secure parking there. I can't imagine parking in the city is any easier anywhere else. The owners sent us a very detailed message before check in with door codes and a brief synopsis on parking in Reykjavik which was very helpful. There was a washer in the apartment but no dryer, and I later learned it might actually have been a combo which I had never heard of before!
The only thing I found to be lacking was any help locating the apartment. No where in the booking or email from the owners did it mention it was called "Grey Apartments Reykjavik" and there is no number on the building when you find it. So it was not easy to find and when we found it since we had no idea it was called Grey Apartments we just started pushing buttons on the security pad because we assumed it had to be that. It was! It is a dark grey building with an arch you walk into to get to the door. Otherwise this was a great place to stay, the bed was comfy, and my mother and daughter slept on the pull out couch and said for a pull out it was very comfy.