We are so glad that you apreciate our friendly welcome and the apartment it self.
It's quite strange that you felt the building loud as you where in the penthouse without any neighbours next to you, but we will study it.
The noise in the street you talked about is even more sorpresive as 99,99% of our guests become really surprised and they really apreciate we are on a extremly calm street in the middle of the down town.
About the night life... Yes the neighbourhood has a multicultural population and there are many people from all countries, specially Italy and India, follow by many sub Sahara countries. Maybe the colour of their skins could be a bit intimidating to you but we had many girls staying at our apartment who most of the times they use to go out to disco coming back home in the middle of the night (03:00, 04:00 or 05:00am) and no one had any problem or bad experience in the streets. Same happens with old ladies, e.g. same time you stayed at the penthouse we had 2 old ladies staying at the first floor in the same building, they didn't complain about the noise in the street etither they had any problem to go out at night and come back to the apartment later than midnight.
Madrid in general is very friendly and sometimes people just start to talk randomly or some guys could even try to flirt with a nice girl too, hehehe
Anyway I encourage you to find a place as beautiful, well located and economical as ours. ;) please let us to know about it cause because we are aware of the crazy prices that many other people ask for to stay at their places.
And of course, if you would change your mind we would be glad to host you again.
Carlos & Victoria