Great location at a great price!
I stayed at the Hotel Carlos V from 02/15/04 to 02/20/04. I have to say that my stay there was excellent. The room was spacious and was well-equipped. The staff was very friendly and attentive. Their buffet breakfast included tasty and mouth-watering ham, cheese, fresh cut fruits, cereal, and frshly squeezed orange juice and othe juices. Also, I want to mention that the location is great. It's within walking distance to stores (e.g. El Corte Ingles), restaurants, and major attractions (Plaza Mayor, El Palacio Real, Puerta del Sol, Plaza Callao, & Puerta de Alcala to mention a few). The only downside about this hotel is that the keychain is very long and every time you leave the hotel you need to drop it off at the lobby and you pick it up when you return.
But still, this hotel has excellent service. When I return to Madrid, I will definitely book my reservation there.