I stayed at Christian’s place for a month. It is a lovely studio tucked on a pretty alleyway in Trastevere. The place was very clean and had everything I needed for a comfy stay including a well-equipped kitchen, big bathroom, bed & couch area with TV/Wifi. The hosts are super helpful and are always easy to reach and communicate with. There’s no washing machine but there are a few laundromats nearby, so laundry was not a problem.
A nice perk is that there’s a cinema right around the corner showing movies in English. Which comes with a downside as the exit doors of the cinema are right in the alleyway where the studio is located (the last movie ends after midnight) and if you are a light sleeper like me, make sure to bring a good pair of earplugs as it gets quite noisy late at night with all the moviegoers coming out and hanging about. The building is quite old but nicely renovated, only issue left is the old, wooden window that lets all that noise in. I know that Christian planned to install a new one, so by the time you book the place the noise issue might already have been solved
All in all, I highly recommend the place, it’s comfy, well-equipped and greatly located within walking distance of everything you would want to see and explore in Rome.