Maria's place was perfectly located in Malasana. It was conveniently next to lots of shops, restaurants, and boutiques. You can also choose to walk direct to other neighborhoods or popular attractions quite easily. This is what made our stay so enjoyable! Communication and response time was amazing.
The house itself had so much charm and character and the main reason why we chose to stay here (plus location, of course). It came with everything you needed to make yourself at home. Things to note: it does become quite noisy with a few garbage/recycle bins outside (clinging of bottles when being disposed of). Also, the second bedroom is in the attic, which we forgot about, even though it is in the photos. Neither of these are overtly bad, depending on your preferences, but good to know.
All in all, I'd highly recommend staying here.