Hotel H10 Universitat, Barcelona, Spain

As to where to stay in Barcelona... Well, since you have many many choices (which makes it easy to find at least three or four nice hotels at a good prices) I think the most important issue is surely the location of the Hotel so my advice is for you to choose one in the center of the city.
I stayed at H10 Universitat Hotel and, without any doubt, I would choose it again. Very near to the Plaça de Catalunya this hotel is very central and, besides having all transportations available just a few footsteps away, one can also easily walk to Las Ramblas and to the Passeig de Gràcia.
Finally as far as the bedroom goes, although it was in fact a little small (some say, shoe-box size), it was impeccably clean. About the food, no opinion (booked only the room) and about the staff, they we're always both friendly and efficient. Loved staying there and I do recommend it!