Next time I'll come back to Josés and Miguel's apartment, whether I'm traveling for business or for fun. It's great value! The apartment comes with a small kitchen and a proper table to eat/work at (wifi works fine), and has a separate bedroom with a nice bed for two.
The location in Eixample, very close to metro Entença, is perfect for tourism, shopping and nightlife. Sporty people should definitely head for Sant Jordi 50 m olympic swimming pool two blocks away.
Communication with Miguel was smooth; he's kind and helpful.