We stayed here on our last night in Rome because it was close to the train station. We had a baby with us and even with all of our stuff were able to walk to and from the station with no problem (it took us about 10 minutes.)
Federica gave us very detailed instructions on how to check in, and it was very easy. The room itself was as described - clean, stylish and very large - it was perfect for the 3 of us. For our last night we walked down to the Trevi fountain area (about 20 minutes away).
If you are looking for a nice place to stay near the train station, this is a really good option. If you don't mind a little extra walking or taking a bus, it would also be a nice place to stay for your time in Rome.