You're going to love this place. Here's why:
1. Convenient location. If you're in Rome to be a tourist (I was) you'll be happy to discover that you're within a moderate stroll of pretty much everything your guidebook tells you to see. It's far enough off the beaten track that you're not completely surrounded by other tourists (at least not in December), but close enough that you can get by without knowing Italian.
2. Great neighborhood. Wandering around Trastevere is way more fun than dodging hawkers outside the Colosseum. And if wandering isn't your thing, there's a great bar around the corner from Maurilio's place -- Bar San Calisto -- that serves espresso in the morning and drinks at night to a friendly crowd of folks from the neighborhood. (If you're a really light sleeper, the happy chatter from the bar could keep you up, I guess. But I'm not. Didn't bother me.)
3. Maurilio's the best. I first contacted him while I was getting on the plane to Rome, and when I touched down a few hours later, everything was settled and ready to go. Maurilio is flexible, thoughtful, helpful, and enthusiastic -- the ideal host. His place isn't huge, but it is tidy, cozy, and homey. If you're traveling solo or as a couple, this is the place you're looking for.
So what are you waiting for? Book it, before someone else does.