Hosts are kind and easy to get on with, the garden is beautiful and quiet, although beware the mosquitoes !
Lodgings are in a good area with excellent transport links to central Rome. Trastrevere itself is an interesting area well worth exploring especially the cobbled streets around the Santa Maria church, also the walk up to Gianicolo is wonderful for the views right over the city.
However, the space in the accommodation is much smaller than we expected (wide angled lense for the photographs perhaps ?) and over our 4 night stay it did become somewhat inhibiting and hard to keep tidy. We dealt with this by using the garden as our 'living room' and the inner space as a bedroom.
The 'cabin shower' over the toilet was not a good experience and putting used toilet paper into the bin (due to 'sensitive' plumbing) is not something to look forward to.
I think the positives just about outweigh the less pleasing aspects and while we would not stay again in the future I am reasonably happy we had the experience.