Gladheimar was easy to find, and the accomodation was spacious and warm. The kitchen was well-equipped and I personally liked all the wooden cabin-like finishing of the inside.
On the down-side, the hot tub was dirty and filled extremely slowly. There were also no instructions how to fill so it took some time before we figured this out. We decided not to go in because of mystery-pieces that were floating in the tub (almost looked like clumps of toiletpaper). The bathroom was a bit industrial, more like a wet room with lots and lots of pipework and fittings for all the heating and water. Tiling in the hallway was letting go of the underflooring. View isn't very nice and hd expected better seclusion/fencing so you don't look into all the neigbouring cabins. Sofa was uncomfortable and the tv had such short cables to electrics and antenna that it was near impossible to set it up to watch. And, although Iceland is obviously not a place to sit in and watch tv, considering the season, there was not much to do in the rainy evening we spent here - also all but one restaurant were closed.
Acceptable but would not return.