I enjoyed my stay in Ms. Maria's house.
It was my first solo travel and my first private room rental, so I was a little apprehensive.
But once I entered the place, I felt at ease. It is clean, spacious and Ms. Maria is very kind. The bathroom is very clean, as well as the kitchen. I actually felt at home.
She told me, " Sonia, estas en tu casa. "
My Spanish is as good as her English, but we had no issues with communication.
The room is about 6-8 minutes walk to the Almendrales metro station. There, you can use the kiosk to buy a metro card that gives you 10 trips. You can go directly to the Center/Sol from there.
You can easily order GLOVO, UBER, or CABIFY- just remember to use the portal number for the apartment. Make sure you ask Ms. Maria.
There is a pharmacy and a little shop behind the building. A huge shopping center, Rio, is about 15 miNutes walk from the apartment. There is a shop at almost every corner.
I also felt safe walking by myself.
I can't speak for the night safety, because I did not go out at night.
Be safe, be smart, and enjoy Madrid.