This apartment was perfect for our family (2 adults, 15 yo, 9 yo) who were first time travelers to Barcelona. There was room for the kids to have their own beds, which is a godsend when travelling, an the location could not have been better- about a 1.5 block walk to the metro, tons of restaurants within a stone's throw, and a little grocery market right downstairs. Albert included tons of travel guides in the apartment, as well as maps of the area showing bus lines to popular attractions, etc. The kitchen has all of the basics to cook a quick meal (we did breakfasts at home and just ate ALL the tapas the rest of the day), and did I mention a separate bedroom for the children? When we arrived, we called the phone number provided, and his aunt (Francis?) came down and let us in- she was super nice, spoke great English, and after showing us everything gave us some tips and tricks for the city and getting around.
Couple of quick notes- the apartment is on what equates to the 8th floor, I believe. There is a lift, but it is TINY- it will squeeze 4 people, but if you have bags it will take multiple trips. Also, the keys are actual old-timey keys that take some practice using. Whomever lets you into the place will show you how to use them (for the entrance to the building and to the apartment), and it would do you well to pay attention, because we found ourselves fumbling with the key on street after a Barca game :)