It's a nice place close to the metro and bus stations. There was also some cofee, tea and a little modest breakfast available, which was nice from the host. Guidebooks and maps of Rome in many languages available on the spot.
However, it looks a bit different than in the pictures - it's much darker (located in a semi-basement), and the room we got had, apart from our own double-bed, 3 bunk beds (but we had it for ourselves, so it was ok). Generally it's all acceptable given the low price and the kindness and responsiveness of the host.