We were a family of four - all adults, and there was plenty of space for us all. It's on 3 floors, with two below ground and all open plan, so some noise does travels throughout the apartment. Our host was great in all aspects making our stay very relaxed and enjoyable and being able to store our bags on our final day was very useful.
There's a wonderful Tapas restaurant immediately opposite and the apartment is very close to the metro system. There were also cooking oils, spices, coffee pods, tea towels, clingfilm, paper towels and bin bags in the kitchen, which was very much appreciated.