Ruben's place is very well located and easy access. It is perfect if you are coming to discover Barcelona and plan to spend your days exploring the city. At the end of the day, you will have a cosy room in a very nice apartment waiting for you. You can easily have breakfast at the apt or cook something for dinner. You will also have very nice views from the 5th floor, the balcony of your room.
Ruben himself is a great host! He is very moderate in a way that he will give you all the information you need and be there for you but then you won't even notice that you are in a shared apartment.
Definitely recommend!