Don't think, book it. Laia's place is awesome, and we really enjoyed our stay. The location is great, close to everything but away from the hustle and bustle. The apartment is new and tastefully designed and decorated. Has everything that one can need, including the best shower we ever had at an airbnb (and better than most hotels) and an awesome terrace. Moreover, Laia kindly provided baby gear so we didn't have to schlep around too much stuff. They even replaced our towels with clean ones half way through the stay, which is a great touch.
The only thing to note is that there are 20-25 stairs to get to the elevator, which we didn't expect and sucked a bit with a stoller, so if you have kids or accessibility limitations you should know, but hey it's Barcelona and we need to be thankful for the existence of an elevator... Wasn't too big of a deal honestly.
Bottom line, awesome stay at one of the best airbnbs we have stayed it. You won't regret booking it.