What a lovely apartment!
We stayed there together with my friend and really enjoyed it. Ferran is a very hospitable and compassionate host: not only he was writing us e-mails from time to time to check if everything's fine, but also left a dozen phone numbers of his friends and relatives just in case :)
The flat itself was very spacious and well equipped (TV set, fan, all kitchen stuff, blow-dryer, iron - basically everything you might need) and nicely furnished. The central market and all the historical sights are just around the corner.
The only disadvantage i can think of was the noise of the street and neighbors at night, but, first of all, THIS IS THE SPIRIT OF SPAIN, which is very noisy itself, and, secondly, earplugs do their job perfectly ;)
I would definitely recommend this flat. Enjoy your stay!