Sandra's place is exactly like what it says in the description. Right in the centre, within walking distance of the major tourist sights; Sagrada Familia, Park Guer, Casa Mila, La Ramblas, etc. If you don't like walking then there are plenty of buses and taxis, the apartment block is right next to the Joanic Metro station (drop you off near Ramblas or the beach front). also if you walk SW along Carrer De Boquiera for 10 minutes towards the Fontana Metro station, you will discover charming squares, food and boutique shops with plenty of restaurants to suit most tastes.
The apartment is well equipped with all the basics you should expect including Aircon unit in the lounge/dinner. (take your own teabags!) being on the 9th floor means the outside is superb with fabulous panaramic views accross the city. A great place to sunbath in private and also good to chill out of an evening. The 9th floor also means that you will want to use the lift which is small (3 people) and slow.