The apartment is well-planned, clean and very cosy. The location is perfect: near to major museums and Retiro-park as well as the Royal Palace; and at a walking distance from Plaza Ana, which is surrounded by great restaurants and Plaza Mayor, behind which you will find Mercado San Miguel, a great place for tapas. For churros, try Chocolateria San Gines (also behind Plaza Mayor, but in the other direction). There is a Carrefour Express near La Latina metro station, just a few minutes away (left when leaving the apartment building). And last, but not least for those with a sweet tooth, there is a great bakery just downstairs full of delicacies (sadly no bread).
The taxi station just across the road is convenient. However, as we were a party of 5, we ordered a small van through Solhop transfers for our trips to and from the airport.
Note: As mentioned in other reviews, one of the bedrooms is on the street side. The street noise bothered all but one of our group, so we stayed in the other bedrooms and used the fourth as a combined dressing and shower area for the 3 youngest (15-18yrs) members of our party.
We had some questions regarding the appliances. The apartment might benefit from a clearer quide re appliance use etc., but Emilio was a very responsive host so we got all the info we needed without delay.