Enrique's place is the place to stay in Barcelona, especially if you like high end shopping. There is a direct line of Renfe train from the airport to Casa Batllo, which is just 5 minutes from the apartment. The metro is about 10 minutes walk, but I think taking the bus is also convenient which is available all along the Passeig de Gracia street to almost all destination.
The apartment is warm enough for autumn season without any need of air conditioning. Air conditioner is there if you need it, however it is placed only in the living room but we found it not a problem at all.
There was a little problem with the water heater but we managed to contact Enrique and within 30 minutes he came to the apartment and fixed the problem.
Overall it's a great place and we definitely recommend the place considering the experience.
Muchas gracias