Breakfast start at 7:30, and we travel also to Florence from Termini. So, if you need to wake up early, and start your day before, may be the timetable for the breakfast should be at 7 am. Even because in this period of time (May) in Rome the city is awake very early !! So, in my personal opinion, breakfast should start at 7 am. But this is only a detail.
The location of this hotel is very good: is only 10 minutes walking to the Coliseum, Foro Romano, Palatino, etc. Of course it is not in the center of Rome (for example Panteón or Piazza Navona), but the hotel is placed in a confortable, quite and good comunicated area. The hotel is only 3 minutes far from the Metro Manzoni station, and only 2 stopped from Termini. So you can easily connect with everywhere.
Roma is a very expensive city for accomodation, so for sure, the Hotel Novecento is a very good option: well located, breakfast included (buffet), not in the area of Termini station (which is an area more complicated specially at night). Breakfast is included and you have everyday fresh fruit, yogurt, cereals, coffee and milk, water, marmelade, butter, honey, bread, croissants, sweets, cheese. So, is quite varied and is buffet. This is my second time in Rome, and for sure, I would repeat in Hotel Novecento if I come back again !!