Thomas's place is a great stay for your time in Barcelona. The location is perfect, within walking distance of many sights around Barcelona and very close to the Metro Station. The roof top patio was one of our favorite parts about this place. We spent every morning and evening up there. Thomas was a great host, responding to all questions quickly.
As other reviews have pointed out the stairs up to the apartment are difficult should someone be limited mobility. I'm sure lugging big heavy suitcases up them would be difficult for some people. Just take this into consideration when booking. We didn't have a problem with them and thought they added a bit of an adventure to the stay.
Would rebook anytime we are back in Barcelona!