This apartment was an amazing place for my wife and I to stay in Barcelona! I can't say enough good things about the location - it's in the heart of where you want to be in El Born, and if you enjoy a nice walk then you can be on the beach in 20 mins. It's a really perfect place for a couple.
Also, we missed our train from Madrid, so arrived later than expected. This ended up not being a problem at all and the team at Deco Apartments were incredibly accommodating. They even talked to the taxi driver on the phone to help with directions once we eventually made it to the train station.
A few of the other reviewers mentioned the small spiral staircase leading up to the 4th floor. That is true, but a very minor issue for us. Perhaps if you had a stroller or tons of huge luggage it would be a problem, but we didn't mind at all.
Would 100% recommend!