We had an amazing stay at Nadav flat ! The flat was unbelievably clean, well designed, spacious, and confortable. The location is amazing, it's in a narrow/calm street, but located near the main touristic places, so we almost never took the metro to visit Madrid.
There are also Carrefour/Dia etc with a 2mn distance for the groceries.
Minty host team was also great, they gave us the keys and explained us all the need to know regarding the flat, Nadav and the team are extremly reactive.
We had a very pleasant stay, I strongly recommend!