Claude's flat is a lovely, clean, comfortable and a very homely place to stay. It is away from the really touristy area of Barcelona (which is easy to get to if that is what you are after).
It is close to everything you would want: local shops, the Mercat del Poble Nou (fabulous fresh seafood), supermarket, restaurants (favourite is Els Pescadors), beach, metro, the Rambla del Poblenou (much nicer than La Rambla in the centre) etc etc etc.
We would stay here again.