Sofia is very professional. She delivers all useful info about the house and neightbourhood when checking-in and is very responsive via the Airbnb chat.
The apartment is very well located, close to two metro stops along the infamous Rambla (Drassanes and Liceu of the green line L3) and surrounded by many services (bars, resaurants, pubs, a farmacy, a tobacco shop, small supermarkets...).
You have to climb steep stairs til the fourth floor to get into the flat; a pretty old, very typical building for Barcelona. It feels spacious for two people, and although Sofia told us the kitchen and living room where a communal space to share with her and her mum, during our 8 days of stay my friend and I have never seen them - it was like having the entire area all for us!
The bathroom is very small but has all the essentials that you need - note: the shower is definitely not suitable for people over 1.70m/5.5ft and there is no toilet seat!
My friend smokes and even though it is not allowed inside, there is a narrow gallery/balcony in which Sofia placed a bottle with water to allow her to.
The only flaw is that the way the flat is designed makes clearing the air difficult, as the position in which the windows are doesn't generate any air flow. At least, when it's hot the AC works very well.