This basement art studio is pretty perfectly located, with buses for the airport and is between two Metro lines and close to buses for exploring Barcelona. It is also an easy walking distance from some attractions like the magic fountain as well as restraunts. We read from other reviews that the air in the apartment was stuffy and it is quite stuffy, fortunately this didn't extend to the bedroom which was fresh with good air conditioning which will quickly cool the room (unfortunatelyy the aircon is intermittently pretty noisy, although this didn't actually bother us too much). The listing includes "breakfast" but this breakfast is coffee and some small plain muffins. But there is also a piano which is very nice and Martin (we didn't meet Bertha) is a fascinating man that has worked with Dali and photographed a lot of music legends.
Overall this is a great base to use to explore the city but I would not personally want to spend large amounts of time in the apartment itself, but another guest was very happy to be based inside the apartment for work for 2 weeks, so it's personal choice I think.