This is a fantastic apartment and a great value. It has an elevator, which is very helpful after walking for miles in Madrid.
I don't think the location can be beat.

The only minor issue was that the cleaning ladies were not done by our arrival at 3, but this is not a problem because at least you know the apartment is clean!
P.S: One of the best Mexican restaurants in Europe is across the street so do yourself a favor and try it out!