Nice small apartment really in the heart of the city, big enough for 4. For 5 is getting a bit of a stretch but you are not in Madrid to stay in the apartment, right? Walking distance from everything. Metro station outside of your door. You can't get a better location than this one... Seriously.
Pretty well equipped, you won't miss anything. Team very responsive and helpful.
Can be a bit noisy at night, no lift so you need to use the stairs.
We had a great time!