We stayed for 2 weeks, booking last minute and Ana was very supportive throughout the booking process but also during our stay. Checking process was quite smooth, we just met an unhappy neighbour shouting at us in Spanish for no reason, but it got sorted out (looks like we were not the first ones who had the pleasure to meet her :D).
The apartment is well located in close proximity to the Monjuic and centre, Barceloneta beach is 40mins by feet or 15-20 mins by bus. Metro, bus and groceries are literally just around the corner.
The internet connection speed was not always the best, especially when it comes to video calls and screen sharing needed for work and on one day it slowed down very badly, but Ana offered her place and dinner to compensate (we didn't use the offer though) and then she managed to fix the connection with the internet provider within several hours. When we were cold in the apartment, Ana arranged for us an electric heater.
In general we found the apartment nice, just a bit more used up than appearing on the pictures, needing a bit of mending here or there, and a bit darker than expected.
On the departure day Ana let us stay longer, which we highly appreciated as it spared us some walking around with heavy backpacks.