We traveled to Barcelona with our 3 children. Six, four, and 1 years old. The apartment was very clean, comfortable, bright, and located in a great spot near the metro, convenience store, and bakery. Buy the 48 hour metro access pass! You can also take the bus with it which makes it very quick to get around with a stroller and little legs. Make sure to bring all your own bathing products and be specific in letting them know if you need a highchair and crib so they can have it ready for you.