It doesn't get any better in terms of location: if you are not afraid to walk, you can reach the main landmarks (Campo de fiori, Pantheon, Colosseo, Altare della patria, piazza Navona) in less than 30 minutes, without using the public transport.
The area itself, Trastevere, is one of the best neighborhood in Rome, full of amazing restaurant.
There is only one major downside: bring a pair of earplugs as the street below gets quite noisy during night, as people were hanging out till late (2/3 am). The windows are not the best in terms of soundproofing and the first night we struggle to have a good sleep.
I would recommend this place just for the location.