Maria and Jesus are wonderful hosts, from the moment of the booking until the very end of my stay they have been nothing but accommodating.
The flat itself is excellent and can accommodate up to 4 people comfortably. The bedroom is quiet and cool with access to a perfect bathroom and the living room/kitchen is bigger than you'd expect and has anything you need. The loft area allows you to have your clothes there and declutter the main area.
Chueca is the perfect neighbourhood if you want to be central but enjoy a quiet stay. You are 2 minutes away from restaurants, shops, bars... but the street itself is peaceful.
As I lived in Madrid previously I didn't get to use all the help they had at my disposal, but they offered to arrange transport, tips, etc.
All in all, i totally recommend staying in Maria's and Jesus's place.