If I'm lucky enough to visit Syros again, this is where I would stay. The views are unrivalled, perched high above all the other houses with unobstructed views of Ermoupoli. The tall ceilings and windows, characteristics of Syros' historic neoclassical buildings only add to the grandeur. Tastefully decorated with attention to detail; extra towels, actual nice shampoo (not a terrible cheap brand), olive oil and vinegar bottle in the kitchen, bottles of mineral water in the fridge, slippers etc. The only negative for me is that there was no mosquito net on the windows and I was bitten multiple times. Even with mosquito nets, they still manage to find me so I think I'm just unlucky!
The location is fantastic while being only 2min from the fanous Miaouli square, and a 10mim walk to Vaporia for your daily swim. Ano Syros is also within walking distance (there is some good parking in that direction as well). The Airbnb hosts went above and beyond to make sure we felt welcome so want to thank Niki's parents for being fab hosts.
All in all I would recommend this place unreservedly.