I would highly recommend David's apartment. It has a great location and it is in a bustling location with many activities nearby. You are a short walk to the Ramblas. Easy access to the beach and la Boqueria. 10 minute walk to Picasso museum. David is very easy to reach if needed. The apartment is very quiet and insulated from the noise that comes from the nearby restaurants. Neighbors were quiet as well. Small details missing were toiletries/body soap/shampoo and coffee (this seems standard in some US locations but may not be standard in Barcelona). I would highly recommend this apartment if you are looking for a centralized location with restaurants/night life.