GOOD:
Clean hotel. Looks like well protected against fire.
Excellent clean spacious room, good bedding, good fittings, safebox (1 EUR per usage), excellent sound-proof windows from street noise (very New York City).
Good LCD TV except that the provided menu in the room doesn't correspond at all to the reality (less channels as advertised).
Smoking room upon request.
Excellent housekeeping and friendly staff
Excellent breakfast (wide choice and quality products) and long hours (up to 11am), with great staff.
Excellent location near 3 metro stations (the best way to move in Madrid beside walking)
BAD:
The poor quality of the WiFi connection, very low signal, most of the time none, and getting frequently disconnected. I found out the best place to catch a low signal: the bathroom sitting on the toilet...
2 connected PC's in the lobby are available free but I also experienced with them some glitches too.
Bad front office staff. Never we felt we were welcomed. Not even a "thank you" at check-out. Addressed with the WiFi issue, the FO manager try to behave surprised by my claim, and some others at different shifts admitted they were aware but don't say anything if something was underway to solve that. It appeared to me that no one is handling the case.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC