Location, location, location!!! This place is just around the corner from the Casa Batllo and other modernist buildings. Fantastic! PLUS that's where a major metro stop is located (Passeig de Catalunya).
Plaza Catalunya, the hub of the city, is just a short walk away as well, so you couldn't have a more convenient location. Yet it's on a street perpendicular to the Rambla de Catalunya and Paseo de Gracia, which cuts down on some of the noise.
The pictures show what the apartment is like -- mostly IKEA furniture, a lot of indirect light, decent-size bathroom and closets, duvets, and white walls. The balcony is small, but you're looking across at some stained glass windows at the backs of some modernist buildings. The heaters worked well as did the hot water. The kitchen is small, as shown in the pictures, but totally functional. In short, I would go back there in a heartbeat! Enjoy!