Like all the other reviews say, Francisca is truly wonderful. My stay with her felt a bit like a “home stay” experience and I felt she really took care of me.
The apartment is in an apartment complex in Nervión, which is a 20-25 min walk into the city center and also has all the amenities you need nearby (it’s a 3 minute walk from the bus line that goes straight to the airport and a 1-2 minute walk to the metro station that takes you to the city center in about 10 minutes). The apartment is spacious and sparkling clean - cleaner than any Airbnb experience I’ve ever had. Though you share a (pretty large) bathroom with another tenant, there is also an extra half bathroom should you ever need it during your stay.
My only caution is if you have back problems, the bed is definitely not hotel-grade (I definitely felt the difference from the Marriott hotels I stayed at before and after). But it is completely fine and I really loved my stay with Francisca! I would love to stay with her again.