Maria's flat is nice and well located in the heart of Chueca! But do not worry, there is no noise at night even if the flat is near lots of bars because it overlooks a courtyard. You can have both : a great party and sleep night! :)
Also it is well located because you can walk everywhere from there . The bedroom is nice, the bed is great, the bathroom is small but functional and has everything you need. We did not use the kitchen but it seems to have everything you'll need as well.
Jesus - the person in charge of welcoming us - was very nice and Maria keeps the contact with you through messages.
I will definitely stay there again.