This apartment is as pictured, very nice! The location is very convenient as it is central to the metro, or if you like walking most places are very easy to get to on foot. There are a number of good restaurants in the vicinity (in fact, suggestions from my friends were all walkable from here).
Jon and Ana also are very responsive. There is a nice list of places to eat / visit and a map in the apartment. They reached out to me a couple of times with suggestions on things I might do. For example, I decided to visit Sitges and Ana provided a link to train schedules as well as a few restaurants in town. Additionally, I had trouble with my bags when I first arrived and they were very helpful in that regard. Also, they were able to check me in about an hour early, which was much appreciated after a long overnight flight. Do keep that in mind though, this apartment is very popular so it's hard for them to check-in anyone much earlier than the stated time.