I Stayed in Rimini November 07 and found it to be good value for what you pay. The rooms are fine, better than what we expected, compared to other places around Rome that are double in price and very dodgy.
It is very central being next to the main train station, we even walked to the Colosseum, which is quite a walk but good exercise.
We found the staff to be nice enough, you can get some poor hotel staff around Europe. I would say Rimini is a good stop over place. If you want to spend 2-3 days exploring Rome and then move on to another destination i don't think you could better, being so close to the train station.

You never know what you are going to get when you book over the Net, but we were happy this time.
The hotel is literally 50 metres from the railway station, but far enough away from the really heavy foot and road traffic. There was some slight noise in the morning but the double glazed windows and shutters deflected most of it.
The bathroom was big and clean with a spa bath and jet shower. The room (408) was spacious, clean and well appointed enough that we re-booked for the over nighter we had to do in Rome before we had to fly out of Italy. We were warmly welcomed.
As previously mentioned by other guests, the breakfast is excellant. The location is perfect for exploring all of Romas' main attractions in 1 day, or more. I didn't feel intimidated by the area immediately around the hotel at night. There is a supermarket in the Railway Station (downstairs), and internet stalls close by. I must mention that I too, slept in the hardest bed of my life. But, I did sleep. And the one time there was a problem with the electrics, someone came within 20 minutes to check on it.

Just returned from Rome and stayed at the Rimini with my daughter and two friends. Within one-half block of the train station where you can catch a train to Pompeii or to Fiumicino, so it is very handy. We had a room with twin beds on the fifth floor(maybe our sixth) with a lovely balcony, and our friends were next door in a larger nicer room. The walls are upholstered and the rooms were spotlessly clean. A more modern decorating scheme and some modern lighting and art would have helped the appearance, but the breakfast was great and plentiful. (Better than an 18 euro breakfast we had elsewhere) Not the most charming neighborhood, but convenient for transportation with good trattorias within walking distance. Good value for the price

Hotel Rimini was the smallest of the 3 hotels we stayed at in Rome. The bed was average but clean and sheets changed daily. Room and bathroom were cleaned daily and towels were replaced daily. It was the perfect place for us especially since we only needed a clean bed to sleep in and a place to shower; otherwise, we were out all day.

Hotel Rimini is located very close to the Termini-about a 5 minute walk. Once you exit the area where the tracks are you make a right and head for the side exit - Via Marghera (the street where the hotel is on) is right in front of you. Since it was close to the Termini it didn't take long for us to catch a RED hop-on/hop off bus to different sites in the city and it is easy access to the Metro.

They had a great breakfast spread and they made fresh coffee per person when requested (they have an espresso/coffee bar machine) which they served to you in your own personal coffee pot.

I have no complaints about this hotel-would definitley recommend it to anyone who needs a convenient place to stay in but it is definitely not a hotel for a romantic getwaway as it had a motel-like quality to it.