Elena was a great host in all the ways that previous reviews have mentioned. The apartment is on a very small street in the lower Gracia/upper Eixample area, close to Passeig de Gracia and Av Diagonal intersection (and Diagonal metro stop). Many restaurants and 2 grocery stores within a short walk.
Go to Foc i Oli (10 minute walk) for a hamburger - yes, a hamburger. You won't be sorry.