The flat is well situated in the close suburb of Barcelona, very close to 2 metro entrances and loads of buses stations, so it's easy to go to center. The neighborhood is not fancy but safe and enjoyable : there are some good restaurants, a vast choice of simple and unexpensive restaurants just down the street and everything you will need during your stay (bakeries, coffees shops, mini supermarket, impressive butcher shop selling awesome Jamon (well, it's spain!) and vegetable / fruits market.
The apartment is basic and simple and is deep rectangle shaped. It's not very bright (only one window) but this is the sort of apartment you are renting to have a place to sleep while you spent most of your time outside.
Leo was really reliable. I recommend the place if you are looking for a good cost benefit.