I stayed in the Campo dei Fiori room for 3 nights. The room is a good size and clean, the shower room is small but the shower is very hot with lots of water!
The rooms are on the first floor (there’s a small lift for those with large bags), and the kitchen/breakfast room is separate and shared between the few rooms here. I didn’t use it but it seemed to be well set up with things to make a simple breakfast.
The location is both a blessing and a curse. You are right in Trastevere with a 1000 dinner options surrounding you, many fantastic, but especially at the weekends, the area is really busy and the noise is hard to keep out of the room. Maurizio has provided earplugs for those that need it, I didn’t use them and wasn’t that bothered by the noise, but it did make me keep the windows shuttered up when in fact it would have been nice to throw them open. The room has its own tea and coffee making facilities, a fridge, TV - none of which I used, but they’re all there. You can jump on a nearby bus (5 min walk) to easily get into the heart of the city.