Marga was a lovely host and the apartment was nice. It was during the very busy period in Madrid over New Year and as it is so close to Sol, it was quite noisy. So expect to experience noise at night due to the night life. (which you should expect)
There was building work being conducted also during our stay which we weren't aware of, however Marga addressed our concerns perfectly and was a lovely host to work out a solution.
Just check in with Marga when booking at what stage it is at. For all I know, it may have been completed by now.
Thank you Marga!