The apartment is little but very comfortable, located in a strategic position in the picturesque district Lavapiés.
From there you can reach by feet or metro (two different stations are very close) every corner of Madrid.
Maribel & Jose are really nice, helpful and accurate even if they couldn't be around in the days we were there because they were out of town.
We asked for the sofa bed to be set but maybe the person in charge to do it just forgot it. No problem anyway because is pretty functional as a single bed as well.
Unfortunately there was nothing like coffee or water in the house at our arrival but there are a lot of mini drug stores around where you can find almost everything.
The place is equipped with everything you need (coffee maker, iron, microwave, tv, hair dryer, towels, linens, blankets, soap, shower gel, shampoo...).
The only downside and the reason of the four star review is neighbors: some of them nosy and other noisy (like yelling and ringing your doorbell at five in the morning). I hope this was just an accident. If so it's a five star.