We liked our stay in Barcelona very much also thanks to Lluís apartment. It's well located you can get anywhere with the metro and you can walk to the Sagrada Familia. Everything was clean and nicely furnished. If you're a light sleeper you should bring ear protection because underneath the apartment is a bar and especially when there's a football game it can get loud.
We would recommend a stay at Lluïs apartment.

Stay: January 2013