Sarah was a great host. Asked for arrival information promptly and provided a local's version of what do in Barcelona which was very helpful.
The flat is a studio close to the Sants train station and on the outskirts of where you most likely want to visit and hang out, but there is a metro station right around the corner which will provide you with easy access.
Do not judge it by the entryway and weathered stairs ( a bit of the lower east side in New York feel ) once you pass this and enter her space, the high ceilings, exposed beams, and charming old door /windows bring the European charm you may be looking for.
It is definitely a good value for the price. Clean and well equipped.
We were dropping our son at school and Sarah's flat worked great for us.