I always went back to Nu's apartments in my last business trips to Barcelona, as I know that for sure they are very well furnished, clean and with any comfort. They even provide kitchen-cleaning-toilet amenities, for some piece in mind when you arrive tired after a long trip.
In regards to this specific apartment, It's 10 minutes walking from Rambla del Poblenou and very close to the beach. It's on the 6th floor, which gives the main bedroom and leaving room a lot of natural light (the other two bedrooms are bit darker as they face the internal patio). A Condis supermarket is right next to the building for any last minute needs.
Last, but not least, Nu's staff is incredibly efficient and welcoming. I'll definitely keep using their service every time that I go back to Barcelona for work and leisure.