The location is spot on. It's a super nice area and so close to the Vatican. A couple of things that would be helpful for you as you decide whether or not to book this room.
1) In order to check in, you have to be able to call a phone number. It is automated, but if you have an international plan, just be ready for this. I was not.
2) To access the room, you have to climb up 4-5 flights of stairs. I also was not prepared for this. If stairs are a struggle, you may want to look elsewhere.
3) To my surprise, someone had come into the room to tidy up and make the bed. Basically like a hotel. When I returned that first day from touring, I was super surprised and taken aback. Make sure you hide your valuables.
4) The bathroom pictured is not the bathroom in the room I stayed in. It is a generic picture. Still a good bathroom, but not what I was expecting.
Overall, this place was nice and worked out well. There were just a few things I wish I'd known before booking, although I probably still would have booked.