The apartment is definitely a value for money.
Check in was simple and easy and it was very flexible for us (check-in time wise).
The walk to the nearest metro is about 10 mins and you can travel downtown easily. If you wish to drive here, there is also free parking space which is around 7-9 mins walk away from the apartment.
There are some convenient stores and a supermarket nearby to buy food if you wish as the kitchen in the apartment is well equipped for light meals (plates, cutleries, refrigerator, microwave and induction hob available).
This apartment is very suitable for 1 person or a couple. I recommend this apartment for your stay in Madrid!