The hotel is located facing the beach, you will walk 10 min. to the train station (a weekly train ticket will cost you just above 20€). From there you are in 30 min at Rome's very central Piramide station. The trains are running every 15-20 min until after midnight, thus the Sirenetta Hotel is a perfect alternative to booking a hotel in the centre of Rome.
The rooms are very clean, large and functional. The staff is super-friendly and the breakfast great for people who love sweet breakfasts with warm pasticerria, cakes and fruits. They also have cheese, cereals and some meat.
All together a very good experience.