Could not recommend Pasquale and Silvia enough! They go above and beyond. I stayed with them for an entire summer and really enjoyed it. Pasquale picked me up from the train station, they both always asked to make sure I was okay, and they even let me move rooms so I could have my own bathroom. The location is awesome as well--ten minute walk to Termini, 15-20 to Trevi, and it is in a nice neighborhood with plenty of places to eat (including great gelaterias). If you want two kind, chill hosts for your time in Rome, this is the place to be!