The location of this apartment can't be beat. Right around the corner from the Plaza de la Merced, where you can find a large grocery store as well as tons of restaurants, bars, and shops -- not to mention the Picasso Birthplace Museum. And directly across from the Plaza is a series of pedestrian streets with beautiful Christmas lights this time of year and even more shops, restaurants, and bars. It's also walkable to many of the city's historic sites, or a quick and easy cab ride if you prefer.
The apartment was lacking in a couple basic necessities when I arrived, but they were easy to get because of the grocery store I mentioned. When I had a minor issue with the TV, the host came and fixed it promptly, which was quite helpful.
The bed is quite comfortable too. I would definitely stay here again.