Mar’s place was wonderful! Convenient to the metros and you have the famous Sagrada Family across from the apartment. Mar and her husband were extremely nice and the communication was wonderful. Lots of shops, little markets,banks, money exchange around the area. McDonalds,Burger King, Taco Bell and KFC down the street. There is a great Peruvian restaurant about 7mins walk from the apartment and a great Turkish restaurant 5min walk. Most places are open late. From the airport on taxi it will cost about 35euros. I suggest using the metro. The metro takes you straight to the airport and back(if you want to save money) metro to airport is about 1hour to 1 hour and 15mins total from the time you leave the apartment and go from there. Barcelona app is extremely useful to have, as you navigate your way through the metro systems.
The apartment was nice, simple. Clean. With everything you need on vacation. Five of us stayed without a problem. Living room has a fold up bed inside the couch. Take a moment to go up in the Terrace at the very top of the apartment. You’ll have a beautiful view of the Sagrada Familia. Locals were nice and helpful. Would def recommend location. Safe and quite with anything you need around. My family and I really enjoyed ourselves.