Me and my friend only spend a night at Ernestos place as we were traveling through rome to fly back home. But we wished we could've spent more time in rome and at his place. His huge apartment is probably the coolest air bnb i've ever been at. Its directly located in the area Trastevere, which is my favorite area in rome. All the good bars and restaurants are just around the corner as such as groceries etc.
As far as I can say, Ernesto is a really helpful and nice host and I will definitely want to stay there again when I'm back in rome!