The apartment itself was great, even nicer than pictures. Location was fantastic, very close to Plaza Catalunya and La Ramblas. It was great to be able to get in and out of the apartment block and the apartment itself using a code rather than having to have a key. It was very clean, lots of little extras that aren't always provided (washing up liquid, sponge, cloth, dishwasher tablet, toothbrushes, shampoo, etc). The cleaning ladies came once and were lovely.
The only downside was how noisy the apartment was. I live in London so I'm used to some street noise, but the apartment is right on a mainroad and the street is very noisy late into the night. The neighbours upstairs were also making quite a racket at 3am a couple of nights too. I tried to ask for a late check out, but unfortunately they could not be flexible to allow this.
Overall I would recommend this apartment and I would stay again. Just maybe bring some ear plugs! :)