I booked the place with two months anticipation, I kindly asked for an offer and the host kindly accepted it, so everything was great, until 3 days before my arrival, when the host suddenly "realized" the price was to low and asked for more money, which we didn't have. After telling that, he told me something like "how can't you have the money? because Rome is an expensive city", something that I consider rude and not of his business. Anyway, the reached a last minute agreement. After the uncomfortable situation, we arrived to the apartment, and we didn't meet the host.
That said, the apartment is great, clean, modern, bright and stylish. The kitchen is modestly equipped, but it's enough to cook basic meals.
It's a bit too far from the center, but you can walk to the metro. One thing to notice is that the walk from the metro station to the apartment is 10-15min *uphill*. I think the apartment is a good place.