Clean apartment is a busy part of Rome. It's more of the "tourist" section and a 40 minute walk to the train station. The best place was clean, quiet, and met our needs (washer was a bonus). But with several day trips to other parts of Italy, we wish we would've picked an area closer to the station (no fault of this residence but just something to consider).
For guests from the states, the card on the key ring gives you power for electricity and internet. The host quickly let us know this but we haven't encountered that set up on travels before. Also, resist the urge to push all the buttons for the lights; it quickly becomes confusing about what powers what and how to turn them off at night. Keep it simple with what you turn on.
TL;DR: clean, quiet, far from train station, lots of lights, comfortable, responsive and friendly host.