We stayed in Charles's apartment for 5 nights. It was light and airy and an easy walking distance to most things. The 4 bedrooms, 3 bathrooms make it an interesting, big place to occupy. There's also a metro station at the doorstep. The location is good because it's away from the late night noise of some places yet close to all the good things.
Charles was helpful. If I return to Barcelona again with 4-7 people I would stay in this apartment for sure.