The hotel is one of the best--compares favorably to the larger 5 star chain hotels (e.g. Ritz, 4 Seasons, etc) but feels more personal. It was renovated relatively recently, so all the facilities are up to date. The rooms are very large in comparison to many other hotels in center city. The bathrooms are very nice with rain shower and soaking tub and two sinks. Despite being in a central, busy location, the room was incredibly quiet (and dark) at night with very comfortable bedding. The staff was fantastic--very helpful with dining recommendations, assistance with transportation, luggage, etc. Chilled Cava and water were both available in room upon arrival--likely complementary, though we did not drink it due to dinner plans. The hotel is very well located on the corner of the El Retiro park which is lovely to walk through. Lots of shaded paths and the Cristal Palace, as well as the botanical gardens. Lots of great shopping, tapas and restaurants nearby. 20 min to airport by taxi. I can't think of a better location.
I highly recommend this hotel and will definitely stay there again when we return to Madrid.