This is a lovely flat near the museums and Retiro park. I really loved the location, there are plenty of restaurants and bars around, and I enjoyed having the ability to walk pretty much anywhere I wanted. It's on the smaller side, but there is a lovely balcony that you can people watch on. As others have noted, it is right above an Irish Bar, but the noise wasn't too bad. I guess if you are light sleeper it would be a problem but it really isn't a big deal. I cooked one night I was there, and it was great because there was a small grocery store right down the street. I can't really say much more about it's walkability to things in the city. Thanks for the wonderful stay Mari Paz!
If I'm ever back in Madrid again, I will try and stay there!