Our stay in Susana's apartment was a very positive experience all around. It is just as shown on the photos, lovely, cosy and clean, with a special, slightly bohemian flair. The kitchen is well furnished but basic. Do not plan on cooking very elaborate meals! There is also a washing machine you can use, very handy for longer stays.
The apartment is indeed very tranquil and is a nice retreat from the hustle and bustle of the busy streets in the old city. We slept very well, the bed is good. And the terrace is such an atmospheric place with brick floors and walls and all the potted plants, we loved it!
The ceiling in the apartment is a bit low, so it might be inconvenient if you are very tall, but the wooden rafters make the rooms all the more homely.
The building is situated in one of those elegant c. 1900 quarters within walking distance of Las Ramblas. Two metro stations are in the vicinity, so it is really easy to get around the city. There are several nice shops, bakeries, cafes, bars and restaurants nearby.
Last but not least, about the host. We haven't actually met Susana in person, it was her friend Pilar that received us. Communication with Susana is very easy and friendly, she is very responsive and seems to be a very warm, easy-going person. Pilar also was very nice and helpful.
All in all, I highly recommend Susana as a host and would be more than happy to stay in her apartment again.