Gabriele's place was great for a 3-day stay in Barcelona. We were able to drop our bags off early to explore the city before check-in time. The apartment is close to the metro.
If you are a light sleeper and like to sleep in a bit, consider bringing earplugs for the early mornings as there was some construction going on outside. It didn't bother me, but I can sleep through anything.
I would stay here again.