Great place. Close to everything.
Can take bus to and from train station. Bus stop is right outside the unit. Metro stop a bit further away, but not needed as main attractions are all a short walk away.
If flying into Rome, taxi is pricey (around 50 euros) there is a shuttle bus that can take you to a place near the Vatican which is a 15 min walk to the unit for much cheaper.
Overall very good place. Highly recommend it.