I stood for 1 month and had a great time.
Location is great, because the flat is in the back of the building so it´s safe for street noise, the kitchen is ok, toilet too although the shower has a problem with the drain because it cramps with the hair, so after showering you have to remove the hair and clean the drain. The price was maybe a bit high considering a studio but in fact it was hard to get a place for 1 month with this great location. The area is superb, Sol in the front, Plaza Mayor ate left, Latina and Lavapies in the back and Atocha at the right.
The decoration could be a bit better; with a slight effort it could turn in a an amazing studio. I maybe consider these items because I stood for a month, but still none of these affected my stay which was great.