Located 12 mins away from the Train terminal, this was one of the 2 hotels we stayed at in Rome.
The rooms were clean, average in space, the beds were firm and there is access via a small lift that fits 2 person and 2 pieces of luggage exactly. Though located near the train station, it is on the quieter side of the terminal so both the neighbourhood and the scenery is more local (especially since a local university is a few mins walk away).
Breakfast is at Bar Jolly 3 mins walk around the corner from the hotel with a friendly Bar owner.
We would have returned to this hotel again when we came back to Rome for our flight out of Italy, if not for the fact that we were on a very early morning flight and we wanted to be very very near the terminal.

We arrived in Rome around 9:30pm and did not find the hotel until 11pm due to the lack of clear directions from the hotel's website. We then called the hotel and the staff was incompetent and could not give us clear directions, such as a landmark (there is a gas station next door, which would have been helpful to know) nor did they let us know the hotel was across the street from the rest of the hotels and the building is unlit and has no sign with the hotel name. The actual hotel is in a residential building. There is a big courtyard upon entering the front gate and the hotel's front desk/office is in one building and our room was in a completely different building. The hotel room was sparse and basic, but clean, so an acceptable place to lay your head at night. The hotel is a short distance to the Termini Station, about 5 blocks. So once we were settled, it was a decent stay. Breakfast is around the corner at a cafe and consists of a coffee, juice and pastry.

The room is located a 5 minute walk from Termini station, and a 20-30 minute walk to the Coliseum/Forum. The staff was very friendly and helpful. The room was a little sparse, but was large, clean, and had a private bath/shower with TV. The breakfast place was around the corner, but the owner there was quite friendly as well. Not the place to go for luxury accomodations, but, in my opinion, an exceptional deal for under 50 euros a night.

Serendipity is a wonderful hotel that is incredibly good value for money. Situated in a very handy location, approx 5 mins from Termini Station and short walking distance to many good cafes and restaurants. The hotel feels very secure, and the rooms were always kept pristine. Breakfast was good, with fresh local produce regularly brought in. Drinks facilities were not available in the rooms, but the attendant upon reception 24 hours a day was always willing to make us a drink free of charge upon request. The staff are always friendly and willing to lend a hand. Will be looking here again for my next holiday.