location is awesome. it's two blocks from aerobus from BCN. two blocks from Universitat (direct to Sagrada) and a few blocks from Catalunya station. Passeig de Gracia station is maybe a little further, but close enough to walk to. all the good restaurants in Eixample are easy walking distance (i.e. Ciutat Condal (end with the chocolate cake), Vinitus (get the creme brulee pudding), others). Ramblas and Barri Gotic is the other way, easily walkable too, lots of good shopping and food in either direction.
check-in: easy (we texted him after arriving at airport, and when getting on the Aerobus). Albert informed us to get off a stop earlier than Placa Catalunya and met us in front of the apartment. we paid our taxes and deposit, examined the apartment (which had some minor cosmetic damages from the previous guests), got the keys, discussed rules (quiet after 10 PM) and how to use the microwave/AC/washer, and to keep your personals safe from pickpocketers on the street.
apartment: large and spacious (3 double bedrooms, 1 double/2 twins, 1 single), clean. elevator is small, so you have to take shifts going up or just walk up the 3 flights of stairs. security man in the lobby during the weekdays was friendly. there's a few supermarkets nearby if you need water or snacks. AC keep the apartment clean during the hot summer. Wifi was excellent. (minor: the master bed sinks towards the middle of the bed, but I guess that makes it cosier for a couple).
check-out: Albert was flexible, allowing us to keep our bags at the apartment until cleaners came (closer to when we need to go to airport); and if that's not possible, the office is a half-block away with luggage storage. no issues with getting deposit back.
definitely would stay here again with large group.