My husband and I enjoyed our recent stay at Hotel Jazz. We had no problems with noise, perhaps because our window faced the courtyard. The room was large, the bed was comfortable, and we liked the gray and orange modern interior design. The bar was chic (and we always had it to ourselves!), there was free Internet in the room, plus two computers in a common room, and room service was delicious and very affordable. The staff spoke very good English. My husband's favorite part was pushing a single button to pipe music through the room and bathroom -- a fun touch. We would definitely stay here again if we go back to Barcelona.

Clean comfortable bedroom on 7th floor-only drawback some road noise(not surprising in a city),solved by closing balcony door/good quiet air con.Great location-near metro/bus stops.
Use aerobus(blue) from airport,alight Placa de universitat 2min walk to hotel.Return journey catch aerobus from place de catalunya.Great intergated bus/metro system.
Lots to do & see.Sagrada Familia breathtaking.
Enjoyed catching the evening sun on the roof terrace.
Will be back.

Just returned from 5 days at the Hotel Jazz having read the reviews here and confirm its great! We were lucky enough to get our room early (arrived at midday) with all we asked for during the booking. The Hotel staff were very helpful, the room was very clean and the breakfast (inclusive via lastminute.com) was excellent with scrambled eggs/ frankfurt sausage, cereal, fruit, cakes, meat/cheese/ breads / toast /juices. I have to say we didnt want to eat much for the rest of the day!
As mentioned elsewhere the centre of Barcelona is noisy but its quieter here than on Las Ramblas. The advantage is that its close to Cataluna Square which is a major bus terminus and where several tube lines cross. We walked easily to the sea at the botom of Las Ramblas and wandered the old City.
Our best travel tip is that whenyou visit Gaudi's Sagrada Familia church ask for the second lift. The queue at the first one was 90 minutes , the second one at the back just 20 minutes.
La Merce festival was great entertainment with processions etc

We stayed at Hotel Jazz for four night while in Barcelona on vacation. It was a great choice for us. The rooms were clean and modern as depicted in the photos and our window was a sliding glass door with a railing on the outside which provided great ventilation. The air conditioning worked really well too. There is a small plunge pool on the roof with lots of chaise lounges to catch a few rays, as well as a number of tables with umbrellas if you want shade. This hotel is in a great location for a tourist and there is a subway station just a few yards from the front door. Breakfast was a disappointment, and you might just walk over to Placa de la University if all you want is a croissant and coffee