My family traveled to several different locations around Iceland and used two different rentals from this same company at the beginning and ending of our trip. They're very good at communicating and have a website for each unit with exact instructions, which is great. The apartment itself was clean, really large and overall, a really nice place to spend time between outings.
As good as the apartment is, it was also light on some amenities. We like to cook for ourselves and there were enough kitchen implements to cook a basic meal, but simple things--like measuring cups--were missing. If you're going to eat out most of the time, you won't miss them, but if you like to cook for yourself, take a look at what you have to work with before planning your meals. If you don't mind walking a little, you're close enough to shops and dining to park your car and forget about it.
I'd stay here again.