Conxi is a great host. She is warm, patient, easy going and considerate. She will take the time to learn more about you and she will be able to recommend place and attractions tailored to your preferences and expectations of Barcelona. Make sure to ask her about the Catalan culture.
The place was very clean. The room was small and cosy (very comfortable bed), with enough room to keep your suitcase, clothes and other items neat & tidy. If you're the indoorsy type, you will be able to spend your time in the bright living room or on the sunny balcony. Otherwise, the are many great places in the walking distance from the flat. I highly recommend it for the lone travellers interested in soaking up the sun and eating good food.
For skaters. There is a skatepark (no verts) in the vicinity, next to a cool little park and a grafitti wall, if you're a writer. For street skating, going donwhill via Rambla del Brasil is a great way to start the day; it will connect you to many arteries of Barcelona and should help you avoid the (beautiful) cobble stone.