I stayed here for two nights. The apartment is extremely neat, clean, and smells very good too. The bedroom I rented (the one with the window) is comfortable and neat, with a large, soft bed. The shower is spacious and has good pressure and an appropriate amount of hot water for three people. It's a very good option for someone who needs to crash somewhere nice for a few days, the location is good (El Raval) and well connected. If you need to put in some work time, I recommend the Sandwichez Sant Antoni, which has great food, seating, wifi, and outlets!
I wouldn't rent it for a long stay because you share the place with two other people (no guests allowed at any time), and the rooms' walls are only drywall, so you can literally hear the person next to you every time they shift of breathe slightly loudly. Also, the noise coming in from the street outside is extremely loud, I couldn't sleep past 9 am.