Perfect place to stay if you want to rest between flight connections. The apartment is simple but you will find anything you need. The bed and pillows were extremely comfortable and the perfume was amazing. I went walking from the airport (terminal 2) crossing the parking, the way is easy and safe but I had a 20kg luggage so it was a bit uncomfortable. You can do it easily with the 10kg one. I had to take my connection from terminal 4 so I took Uber (7 euros, less than 10 min drive).
You can find all kind of shops in the area and the old town in Barajas is beautiful to take a walk and have some bocadillos and cañas in one of the small bars before continuing your journey.