My wife and I stayed for 3 nights in early October 2012. The hotel was arranged by our agent, and although initially hard to find (because of basic taxi driver) we settled in to our nice but outdated decor room. The check-in staff were tops and through our leave the check-in and breakfast staff were very welcoming and helpful. The hotel has a good breakfast and is in close walk to Puetre del Sol. For here you can get the hop on bus for a good tour around the sights of the city. The room was spacious and the bathroom quite clean and functional. This is a good hotel to stay on a medium budget when in Madrid. We felt incredibly safe in this part of Madrid due to the high level of Police presence (recent Government initiative) and were happy to wander the area in late evening in well let areas. No hesitancy in recommending the Carlos V.