Fantastic location, with a little balcony overlooking La Rambla and the Boqueria market. A nice apartment, well equipped and well maintained. Staff were efficient and helpful.
An added bonus - we discovered that there's metro station right outside the apartment. We liked using the integrated bus and metro tickets.
The Plaça de Catalunya square is a short stroll (or a decadent one stop on the metro). Here is the main hub for hop on hop off buses. There's a fantastic panoramic view from the top floor restaurant of El Corte Inglés on the square.