Antonio's place is very nice. Every room has a window which makes it very bright.
The rooms are large, only one has a TV but there's another TV in the living room.
The kitchen is small but good enough and well equipped (an electric kettle would be good).
The apartment is clean and the host is perfectly attentive.
The building is a bit old and rusty, but the location is perfect just two blocks from Embajadores metro and train station.
If you plan to get by car, please be aware that the area is "Madrid Centro" where only public transportation (taxy, Cabify, Uber, etc.) and locals can enter and park.