It takes a few steps up the stairs to get to the place but nothing too bothersome. I didn't get to meet Marina but her brother was there to introduce me to the place. You have literally everything to make your stay comfortable.
Sevilla is walkable and the place is close of the train station Santa Justa (around 15 minutes on foot). My only complaint is that the walls are thin. You can hear the people on the second floor and courtyard even at night. So, if you are a light sleeper, be aware.
Overall, I would book it again if available.