The location couldn't be better. Right next to Atocha Train station.
The place was spotless.
The instructions for check in were easy.
The beds are really comfy.
The only thing to beware of is that the bathroom door doesn't stop others from looking in. On top of that, it has a big hole that allows visibility inside. So if you are not a couple, keep that in mind.
Otherwise highly recommend. So close to museums, restaurants etc!