Me and my wife spent 5 days in Barcelona on May of 2013 and Juanmi's apartment was one of the reasons our vacation was amazing.
The apartment is in a luxurious apartment building, secured and convenient. The place was very clean and equipped with everything we needed and more. The photos give a good idea of how the place looks (what you see is what you get).
Upon arrival, Juanmi welcomed us and gave a brief tour of the apartment and some tips for the surrounding area. Check in and Check out times were adjusted to our needs (no problem as long as the apartment is available) and Juanmi helped us during our stay with every question we had.
Location, location, location - the best in town! 5 minutes walk from ramblas, raval, gotico. It was fun to wonder around the ramblas in the morning and drop by the apartment for a short siesta at noon and back to wonder the bari gotico. No need for Metro/taxi/bus.
When using the metro there is a very close station (Catalunya) that takes you anywhere - Montjuic, La Sagrada Familia, Park guel and the beach.

Thanks Juanmi, hope to be back soon!