Gianni very kindly picked us up from the train station and was helpful and friendly.
The flat is really well located in a quiet residential area by the river, but still only a short walk from the bars in Trastevere. It is very well located for public transport to the city centre, only a short ride away. Just round the corner is a great pizzeria, and a handful of shops for most of the things you'll need.
The flat is a good size for 4 people so was pretty spacious for the two of us.
There is a small elevator which was handy!
The only problem I can think of is the hot water in the shower is very temperamental, but I think this is common in Rome.