Albrod was a great host, he was there in person to hand the keys to us upon arrival, and checking out was very easy after our visit. The flat is small but had everything we needed, with a well-fitted out kitchen that has everything you'd expect. As others have mentioned I think 4 people would be a tight squeeze, but 3 people fit perfectly. Everything in the flat is good quality, the double bed in particular is very comfortable, and the bathroom is excellent - a powerful shower which stays hot all day. There are two sets of keys provided to you which made our stay a lot easier, although we didn't figure out until the last day that you don't need a key to exit the building (there's a button to press in the hallway) - D'oh! The location of the flat was very convenient for us as we needed to be near Embajadores, but it's a short 20 minute walk to Sol and all the tourist attractions. It's 2 minutes walk from Embajadores metro station which is great, and there are plenty of small shops/Dias nearby for groceries etc, and a taxi rank near the metro station. For a greater selection of restaurants head towards Lavapies, Sol or Atocha as there's not much near Embajadores. We really enjoyed our stay in Albrod's flat and will definitely consider returning to his place if we come back to Madrid next year :)