This is a great place to stay. It was very close to a metro station and easy to get to from the main railway station Atocha. It was an easy walking distance to a lot of things that Madrid has to offer and we walked everywhere we wanted to go.
The apartment itself is funky. Brightly decorated and comfortable. Our host had left tea, coffee, fruit, and bread. There was also cold water in the fridge and plenty of other staples to use if you wanted to cook. Magdalena meet us at the apartment and was very friendly. She explained everything we needed to know and also had a travel guide of all of her favourite places to eat and to visit.
We had a bit of trouble with figuring out how to use the shower in the main bathroom so it would be a good idea to ask.
The ensuite bathroom had a shower over the bath with a hand held shower head. Unfortunately the holder for you to use it hands free needed to be fixed properly as it didn't hold it securely for you to have a proper shower. This was the only negative.
I would highly recommend this apartment for a care free stay in Madrid.