Cruz hosted us in the middle of heart of Eixample. She was very accommodating, her kitchen was stocked up with basic stuff. Clean place. Although I had booked the single bedroom unit it needed some work on the heater so Cruz hooked us up with the two bedroom unit without any hassles. Barcelona units definitely seemed expensive during this period (mid December) so I can't comment on the affordability of the place.
However, this place is a stone's throw away from all the important areas. Cruz even warned and prevented me from making an unnecessary purchase of city pass (this was something specific to our needs, she and her husband looked into all our criteria and made spot-on suggestions).
Overall, my wife and I are extremely happy with the choice we made.