I love Barcelona, it was my third time there and I can honestly say that being Alejandro's guest was one of my best experiences. This time I visited this beautiful city with my fiancée and our friends. What follows is our combined opinion.
Alejandro was helpful and nice, you can come to an agreement with him quite easily (late arrivals for instance) and he resolves any kind of problem. The apartment was spotless (you can't really say that about the building itself but it's not Alejandro's fault) and well-equipped. If you're looking for a place near the beach, it may not be the best choice but if your main goal is sightseeing, you couldn't choose better. It is located in the area with metro station and one of the main tourist spots - Sagrada Familia.
I highly recommend it to everyone!