Tried this place as it was close to where I was staying and read positive reviews. It's a nice restaurant which is patronized by locals, so no danger of getting caught on a tourist trap.
Food is simple, unpretentious in presentation, just traditional dishes done well. As it is very close to Vatican, you will probably see clerical collars in there. :) It's a very busy restaurant so either come when they open for dinner or make a reservation.
I had a half liter of the house white wine and it was a very generous half liter, three good glassfuls. The Porcini Risotto was such comfort food and I was happy to find out that they don't use a meat based stock to make it, so it was vegan.
On the whole, finding vegan choices can be challenging. Nice to find a risotto I could have. The parmesan was offered on the side.
Service was good, efficient and pleasant. Prices reasonable.