My friends and I had a great stay at Madrid. The appartement was nearby the metrostation that brought us to the city center and there are a lot supermarkets nearby. Some issues we had; the curtainr was broken, so you couldn’t open it aswell as the windows. The appartement wasn’t really clean as well. We didn’t spend a lot of time in the appartement because of the great weather. You can stay in the appartement with 4 people, but I would only recommand it for 2, especially if you’re planning to spend some time over there or you if you want privacy.