Alessandro is friendly and helpful in giving information about Rome. The room is well-furnished and looks very nice. It has a good shower and a fairly good bed. It is a bit dark, but that's normal in the heart of a big Mediterranean city, and in summer it's probably a big advantage. The neighbourhood couldn't be better: it's lively but safe, within walking distance of the major sights and with several restaurants within a minute's walk. (We enjoyed pizzeria O Pazzariello and returned several times.) There are also several bus stops nearby. Professionally performed live classical music was audible on three consecutive evenings, thanks to a concert-hall-cum-church just next door - we loved it!
The main disappointment was that the shared kitchen may not be used for cooking, only for making tea and coffee (which is included in the price). Since we had planned to cook, we were rather upset when Alessandro told us in no uncertain terms that we were not allowed to, so as not to inconvenience the other guests with cooking smells. Fair enough, but contrary to his claim, we could not find this information on the webpage.
In all, we'd recommend the apartment.