Alessandro was a very communicative, polite and hospitable host. He arranged for his assistant to greet us upon our arrival in Barcelona who then showed us around the apartment. The apartment is located in the wonderful artist neighbourhood of Gracia where there is practically everything you need (groceries, plenty of bars and restaurants, close to a metro, etc.). We locked ourselves out of the apartment on our first night and Alessandro was quick to send someone to help us. He also let us keep our bags later in the apartment on the day of our check out as our flight was later in the afternoon.
While overall I really enjoyed the apartment - it was clean, located in a great neighbourhood, and has a great patio - there are some quirks/maintenance issues as well. We only had one set of keys for four people (the last guest had accidentally took the second set) so logistically this provided us with some problems. The wifi works predominantly in the living room and not in the bedrooms. The bathroom light didn't work so showering/using the toilet at night was in the dark. One bedroom doesn't get AC but there is a fan provided. All that being said, these were minor items and we still enjoyed our stay.