This is my second trip to Rome. There was a small passport SNAFU, not the fault of the owner, and we arrived a day later.
The location is not as close the St Peter's as advertised. The neighbourhood is average, there are better restaurants in Trastevere. The apartment is decorated well, however we experienced a problem with drainage in the shower and icy water for two days. The owner was responsive but we still had to heat water to bathe. The owner offered us another day at another location since we missed a day, but at a reduced rate.
I asked for a refund for the day that I missed and was denied. I thought that this may compensate for the poor plumbing but clearly not.