Barcelona apartments / homes usually have thin walls. And that means noisy and can be cold.
This location was next to quite a busy street, but inside the apartment you didn't really hear the sound from outside. The apartment didn't feel cold at all, acknowledging that the temperatures were not near freezing yet.
2 bedrooms are comfortable, the sofa bed also worked out for our third guest. The bed, linen, all were comfortable.
The apartment is super clean! So no worries about that. Too bad the 2 bathroom & 1 toilet were in the same corner of the the apartment. You just have to be quiet walking to them in the night not to disturb others.
SweetInn's application works well, opening/closing doors, communications with the team. I would probably go for communications only in the app. It's a bit confusing having AirBnB, WA messaging and their app.
Only thing I hope is that they get the boiler fixed to give more steady warm / hot water.