Nicholas's apartment was great - a nice space in a lively neighbourhood, with plenty of restaurants and bars near by. He greeted us on arrival and gave us a tour of the space, as well as travel tips and local recommendations. Everything was as shown in the photos and we had no complaints. There were three of us staying here, and it was the perfect size for us.
The apartment is close to a Metro station for easy access to the rest of the city. It also only takes around 20 mins to walk to the Gothic quarter from here, as well as the amazing Mercat de Bocqueria just off La Rambla so if you like to explore the city on foot, Nicolas's flat is a great base.
The only thing I would say is that the apartment is on the third floor but involves going up five flights of stairs (there is no lift). This wasn't a problem for us but worth bearing in mind if you have accessibility issues.