I have stayed for the second time at this apartment for a weekend break in Madrid and I just can repeat the positive comments I made after my first stay.
I would like to highlight the flexibility of the host for both the check in and the check out, and also that she was replying very quickly during the whole process.
As for the rest, the place looks as described in the website and it is clean and tidy. Good internet connection, good storage capacity for your clothes, a fully equiped kitchen including dishwasher, nice bedroom and very bright living room.
The nearest underground station (Puerta del Ángel) is within a short walk (5-10 minutes) from the apartment. There is also a bus stop literally by the front door which takes you in about 15-20 minutes depending on the traffic to Opera underground station, in the city centre.
There were no noises from the neighbours of from the street (the apartment is located on a third floor, and the lift was working properly). I would have no hesitation in recommending this apartment for anyone visiting Madrid and looking for a quiet place to stay.