The place is awesome! and for many reason.
1. Location: You can get there from the airport on Aerobus. Which is a public service right from the airport, cheap price compare to a taxi, and from the stop you walk 5 min to the place.
2. Safety: The place is located in a very nice and comfortable neighborhood, quiet, but with a lot of nice people, restaurants, public services like taxis and buses.
3. Apartment: The place is huge. It has big windows to enjoy sunlight, comfortable beds, portable heating units for the three rooms, kitchen full equipped and laundry, too (But you are not going to use it cause you are going to be out enjoying Barcelona).
4. The hosts: Nice people and very quick response for any question. They provide you with so many tips in case you need something as minimarket, pharmacy, etc. 10/10!
Conclusion. You are going to love their place! I will reserve it again when I come back to the city.