MY STAY: 2 nights in a 9-man room (4x bunk bed, 1x single bed).
LOCATION: Convenient, very close to the S. M. Novella station and less than 1 km far from S. M. del Fiore. You can leave and head to the city early and come back late without feeling dangerous.
HOST: Very kind and helpful, though only speaking Italian and Chinese (his daughter can speak English).
ACCOMMODATION: Comfortable bed, warm shower, lockable lockers, utilizable kitchen equipment (nota bene: you can't cook or bake). Finding room in the fridge could be quite tough sometimes.
OVERALL, I had a very good stay here and would recommend the place to anyone who seeks a decent affordable shelter and primarily wishes to expore the city.