Roxana was absolutely lovely and super helpful with the check-in and also before. We had no issues whatsoever with the booking or the hostess. The location of the flat could not be any better - it is quite literally two minutes away from Plaza de España on foot. It couldn't be more central.
The flat itself is a little dated, but it's very clean and nicely maintained. I found the bed super comfortable and slept really well. Although the place is quiet, bring earplugs with you if you are sensitive to outside noises. You won't hear any cars (which is great), but sometimes youngsters gather outside and talk loudly, their voices being carried by the configuration of the buildings.
So all in all this was a very good stay and I can totally recommend Roxana's flat! Many thanks.