Cristina and her husband Carlos are very nice people and have a nice apartment in a great location. The apartment was about a 10-15 minute walk away from the magic fountain as well as Las Ramblas. It was being worked on, but the apartment is also a block away from the Mercat de Sant Antoni, and just a two blocks away from the metro.
The wifi was a bit slow, and depending on the device wasn't functioning very well, but for us did not hinder our experience here.
Additionally, Cristina and Carlos gave a lot of helpful tips about the city and were very easily reached by phone.