Great top floor flat, very spacious with two bedrooms and a large living room/diner. The kitchen is also a decent size to prepare meals, and comes equipped with a dishwasher, fridge, freezer and washing machine so you can get anything done that you need to. It's also fully stocked with all the equipment you'd need to make a nice meal or some drinks.
The roof terrace is one of the best things about the flat. It's a top floor flat, so no-one above, which means the sun is on it most of the day. Not a problem if it gets too hot, as there is an awning which you can set to come down for some shade. You also have great views of the street going north and south, and can just see the Sagrada Familia peeking over the flats opposite, as it's only a couple of blocks. away.
The location is great; it's in the city and only a couple of minutes away from the Sagrada Familia underground station. But it's also really easy to get the bus around, or even to walk about 15 minutes to get on the Tram at the Glories station. As well as that, being a big city, there are many cafes/bars/restuarants within easy walking distance. Finally, if you like to prepare food yourself, at street-level of the building there is an organic store, as well as a few supermarkets nearby.
I have just stayed there for more than a week and this place really made my holiday!