We couldn't have been happier to have stayed in Celma's apartment. It is located in the Malasaña neighborhood of Madrid. The location is excellent as you are about two blocks away from the main street, Gran Via and right on Calle San Bernardo which you can easily walk on towards the popular El Sol neighborhood and other tourist attractions. The location gives you the best of both worlds, as it's in as local area but yet very close to the touristic sites. Right downstairs you'll find a couple of small cafes, a grocery store, etc. The restaurant Scone is great for breakfast. They have the best croissants and cortados you'll find. A short walk on San Bernardo and you'll run into a neighborhood restaurant called 360 and this has to have been the best food we've had in our trip.
The apartment itself was excellent as well. It is on the 3rd floor and is one of the few Apts in Madrid with elevators (which come handy when you're carrying luggage). It is very comfortable, modern, clean and had a great a/c in both the living room and bedroom. The WiFi worked perfectly and even though there were usually many people walking the streets, the apt was very quiet.
Celma was a pleasure. She made sure we had enough espressos during our stay along with plates, glasses and all the utensils you normally need. We highly recommend this apartment for your stay in Madrid.