This apartment is great for a weekend away or short stay. It was well located, we had a great check in with a friendly host, and the communication was quick and clear.
However, we were staying for over a week and I wouldn't stay there for long periods. The flat itself is basic and a slightly worse version of how it appears in the photos - the bedroom is basically a corridor, there are no doors (apart from into the bathroom), and the lighting is either no light, or one very bright ceiling light. At night I read using the flashlight on my phone.
We were working here and while it was close to the park and a stones throw from Poble Sec, I avoided spending much time in the apartment where possible. If I had just been there for a weekend and out all the time, it wouldn't have mattered.
The hallway (while not in the flat itself) was quite grim - peeling paint, very dark, and very steep stairs to get up to the flat. Not something they can easily fix but a bit dispiriting.