I stayed at two hotels in Monti while I was in Rome, and I wish I'd stated at this one the whole time. Great location, staff was super friendly and helpful, room was comfortable and breakfast was really good. A major plus: it was extremely hot and the air conditioning worked really great. I've had many European hotels claim to have AC but have them barely work. This one worked great. It is on a fairly loud street, but the windows kept the noise out well.
Breakfast is 5€/person, delivered to your room. The food was great, and nice to start the day (mostly cold items, but good array).