Good hostel, safe, close to A line Manzoni station so you're only a subway ride away from Vatican, St Peters, or Spagna for shopping. The tram and bus lines are nearby as well. I hiked from Tremini (train) on arrival and it was close, but would've been easier to take the sub. Colosseum, etc., about 30m walk, or a bus away. They have events every night which had packed out the patio area, and made it super easy to get to know other travelers. The cubes are a sweet idea - unlike regular hostels you still have some privacy in shared rooms and a lockable bed and cabinet you can use to arrange and organize.