I live and work in California, USA; I and my partner, Galina from Russia, really, really enjoyed our stay in your apartment; it was clean and all the amenites were there - full kitchen and a nice comfortable bed for Galina and I. We had central access to the Metro from Fontana and Jonic so we could easily get around the city (once we learned the basics of buying tickets for the Metro). Its a very nice neighborhood; close to several small markets so we could shop or go out for dinner at local small restaurants; Pilar’s husband, Fabian, picked us up at the airport on time. They were both very helpful in getting us acquainted with Barcelona.
I and my Galina highly recommend staying at their apartment.
Of note, local banks will not convert your currency to Euros; you must go to Ramblas to a Currency Exchange Booth there. Have fun...