The apartment is great: very clean and new - it looks exactly like in the pictures. It's right in the centre, you can get there by public transport (I wouldn't recommend going by car - the streets are very narrow and there's a lot of traffic). The Wi-Fi connection in the apartment worked perfectly. We have no complaints at all. We couldn´t have chosen a better apartment for our stay.
However, it can be a bit noisy at night (which is to be expected in such a central location). We didn´t mind though.
As for Ana, she´s the perfect host. She welcomed us and gave us maps and a lot of insider tips for our stay. She also offered to call us a taxi for our trip to the airport, which we gladly accepted (you can also take the underground, it´s not far, but it was more convenient that way). Needless to say, the taxi was there at the arranged time and everything was fine.
We would definitely stay there again and recommend the apartment to friends!