A nice apartment close to Lavapies metro station and 5 min away from Museo Nacional Reina Sofia. Madrid is a walkable city, so we walked to everywhere and the location was perfect for this. We were 2 people and we had enough space, but I can imagine that the place would be too small for 4 people. If your plan is to spend most of your time in the city, then you'd be ok, but for hanging out and spending more time in the apartment itself, I'd choose a cosier one. To summarize: an OK Airbnb, nice enough, but don't expect something special.