We stayed here in late October 2013. Arrived by train to Madrid Atocha Station. Cost only 10 Euros by taxi. The place was in an excellent location, all the eateries and drinks places you require within a 2 minute walk. Not many tourists here, mainly expats and locals.
Found some excellent restaurants / tapas bars around the corner.
Great views from the opening window of all the street life and old buildings. The shutters do a nice job of keeping out the light and noise.
Wifi was quick and supports multiple devices.
The apartment was very clean and tidy and the bed comfortable.
The apartment is on the 3rd floor with no lift so don't bring big, heavy suitcases.
Only a 5-6 minute walk to Plaza Mayor where the tourist info is.
We would definitely stay here again when next in Madrid.