The location is very convenient. It's right next to a metro (great to use if you get the Roma Pass) and a 10 minute walk to Termini station. There are a few places near by that don't seem completely safe, but the immediate area is ok.
The room is very small and the beds are not very comfortable. The pictures are accurate on what the room looks like and its size. The owners seems to have two properties on the same block with multiple rooms in each. There were two full bathrooms at the location we stayed at, but they are shared with the other guests. For us that meant waiting 1.5 hours to be able to take a shower and seeing a lot of hair left from others.
Overall I would not recommend this for an extended stay, but it works for a night or two.