We loved Eduard's place. It is in a great location, and the rates were reasonable compared to other available apartments of a similar quality. It is smack in the center of the city literally a few blocks from Placa Catalunya, and has great access to public transportation. It was easy to find the building and the apartment. Everything worked well, and communication with Eduard was great. There is a business nearby that held our luggage so we had a full day even on the day we left.
The only thing that may be a turn off for some people is that Saturday nights in any central location in Barcelona you are bound to hear the crowds partying until late into the night. My daughter and I slept well, my wife did not. But this is unavoidable in an apartment in the center of the city.
Barcelona as a destinatio, the apartment and Eduard are also warmly recommended. We certainly hope to come back.