(In Italiano più in basso)
I used to live 2 blocks from there so I know well that the area (and particularly the block where the apartment is located) is not great looking at night but also being next to Termini station is extremely handy (trains to airport, rest of Italy, both subway lines, bus terminal, and you can walk to/from city center.)
It's particularly handy if you come from/to the airport by train, since the platform where it stops is right on via Giolitti. You get off the train and you are almost there (just take the side exit).
The room is clean, quiet, shower is good, bed is very good (better than mine at home), the room is right after the entrance (so you even don't feel like at somebody else's home.)
Bathroom is inside of room.
There is even a small fridge in the room, and a handy TV over the bed.
Basically I confirm everything said in previous reviews: everything good, apart from appearance of location (maybe not good for a single woman at night?)
The only negative aspect I didn't read in previous reviews is this: there is an elevator but starts from a mezzanine, so you have to do few steps (5 or 10), for some people this may be a problem, not for us.
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La stanza è molto buona, pulita, comoda, silenziosa, il bagno è comodo e nella stanza. La posizione è comoda, di fianco Termini, solo forse non consigliabile a donne single di notte. Unico aspetto negativo che non leggo nelle altre recensioni è che vanno fatti alcuni scalini (5-10) prima di raggiungere l'ascensore (può essere un problema per alcuni, non per noi).