Great (firm, but comfy) bed, good access to fresh/outdoor air, a mini fridge, kettle & nespresso maker (in an 'upgraded' room at least). Quiet area with good access to Metro & tourist spots, so a really nice balance. Walls could be thin when neighbors came back post-bar-hopping but most of the time it was really quiet. Wifi (top floor) was a bit slow. Nice open staircases for use instead of elevator if you wanted to. Breakfast didn't change much daily, but had an extremely wide variety so it wan't a problem (I stayed almost a week for a professional meeting), and they had GF bread if you requested. Addressing an earlier review, the water itself is fine, just a bit of lingering sewer gas occaisionallly (common, not a problem). Overall a really good stay, and I'll definitely re-book the next time I am in Madrid.