Claudia is a fantastic host, extremely communicative and clear about check-in. The place itself is very comfortable and even though it is a shared bathroom with other guests, the shared spaces were always very clean.
The only thing worth noting is the location - even though the central location in Trastevere means that it is very convenient for nearby restaurants and bars, the downside of that is that it can get quite noisy (downstairs there is a bar with live music). Claudia definitely made up for it though by providing earplugs, but if you need somewhere very peaceful or are sensitive to noise then this would be worth taking into account.