I spent four nights with my Sister at John & Vanessa's apartment and had a lovely time. The apartment was clean which is in my book the most important thing. It was slightly smaller than I was expecting from the pictures but not a problem as only two of us sharing the space. Maybe not so good if more than four!
The area of Poblenou was great to stay in. Having moved from a more central apartment to have a change of scene for our 10 day stay we actually wished we had done it the other way round as it was still easy to get to the city but the atmosphere here made you feel like you were really living in the city as a local. Loads of wonderful shops & markets for self catering or cafes/restaurants for dining out. The apartment balcony was wonderful for breakfast and although large apartment block it was surprisingly peaceful when we were there. I would definitely recommend a stay here.