I've spent more than a month at the flat whilst working on a project in Madrid. I can truly say that the place was my comfortable "home away from home". It's not a brand-new setup but it feels better than new because it's well laid out, well looked after and just naturally stylish and well equipped.
Before my stay I was a bit concerned about the need to climb stairs to the 3rd floor from someone else´s review but that´s not the case. One just needs to climb less than 20 steps to the lift on the first floor and then use the lift to the 3rd floor, not a big deal.
Julia and her family are very easy to reach and reply quickly to any need -- they don´t feel remote and impersonal like many professional hosts on this platform - a big plus to me.
I will definitely stay in the flat again, next time on a holiday in Madrid.