I loved the location. It was easy walking distance to many great attractions and the metro stations, Opera and Tirso de Molina were easily accessible for everything else. The apartment was clean and well laid out. Having 2 bathrooms was a nice luxury. Javi and Vanessa had laminated a map with many suggestions for food and entertainment.
We also tried out Tirso de 5 near the metro station and the prix fix for the day was great and a good value at 15 Euros.
The two drawbacks were street noise and to a lessor extent, one of the showers.
We were at the apartment during Semana Santa, so perhaps there were more revelers on the streets than usual. The apartment is across the street from a garbage & recycling station & there is a pick-up around 23.30 (11.30 pm) every week night. If you are a night owl, this won't disturb you; if you are not, maybe bring some earplugs.
The bathroom attached to the front bedroom was great. My friend had trouble with the shower in the 2nd bathroom. With its low lip and shower curtain, water ended up on the floor most mornings, despite trying out different techniques to minimize the overspray. It was a minor inconvenience, compared to the many nice touches in the apartment, like well appointed kitchen & comfortable sofas overlooking the small balcony.
And did I mention, great location?!!