The place is great, very clean, the beds are comfortable and the kitchen and bathroom are fully equipped.
The location is wonderful if you are looking for a quieter place. There is a metro station very near and you can get virtually anywhere in Barcelona in about 15 minutes.
We traveled with our two teenage daughters and the fact that there are two separate rooms made everything better since they had a room of their own and were not occupying a sofa in the living room.
In addition, the living room is well designed and equipped too, so we watched a movie every night since the flat TV is connected to Netflix and Amazon Prime. It was nice to relax at the end of the day when days are so hot in July/August and on average you walk about 6 hours every day :).
We recommend Johannas'place highly.