Perfect place in a perfect location, 5-minute walk from/to Santa Maria Novella train/bus station and very close to major attractions like the San Lorenzo market, the Duomo, and Ponte Vecchio.
Very clean and cozy. Beautiful paintings hanging everywhere, painted ceiling, clean bathrooms with super hot water and they provide four clean towels for you, the mattress was super comfortable and the comforter was really warm (very important especially since it was freezing), electric kettle and tea/coffee in the kitchen, they even include a free breakfast (coffee/tea + pastry) at a local cafe. Very safe as the building is accessed by key and each room has its own key too.
It was just a perfect place to stay. I didn't get to meet Breditz or Nadja personally but I did hear from other tenants that they are lovely. I did however meet Breditz' dad, Alberto, on the wine tour they offer (great experience by the way), and he is just lovely!