We stayed at hostel Beautiful this autumn. The bathrooms were dirty and the hot shower was available only from 9 am. Nobody told us about that, of course. So we wasted some time. Besides, the water stream in one shower was very weak, you can't take a shower actually... They didn't give us any towels.
The lift was not working and we had to take our heavy luggage to the 3rd floor.
The only good thing about this hostel is its location. It is near Termini station.
