Highly recommended. I used to live in Barcelona and this is one of the best areas to stay - very nice security building just off the Gran Via, a 5 minute walk to the Eixample district (full of great cafes and restaurants), and a 10 - 15 minute walk to the area around the Plaza Catalunya.
I will also specifically note - fantastic hosts who are very helpful and communicate well, and the apartment is spotlessly clean. My family is frequently in Spain and this is our new favourite place to stay in Barcelona.