This apartment is located in a nice neighborhood (Poble Sec) with lots of services and close to two metro lines and the Mercat de San Antoni, a very nice indoor market. The hostess was very nice, met us in person when we checked in, and was responsive to our requests.
I gave it 3 stars for value because 300Euros per night is a high price for this place. I have stayed in other rental apartments in Barcelona which were more modern and better designed (kitchen, bath, flooring), had more closet space/shelving and drawers for clothes and luggage, and higher quality furniture. As noted in the ad you must supply your own toiletries, which shouldn’t be the case at this price point.
Note that if you plan to do laundry, the machine only washes clothes and doesn’t dry. You’ll need to use the drying rack in the apartment or you must take your clothes to the laundromat across the street. Other apartments I had stayed in had machines that could wash and dry, so I was not expecting this when I was staying there.