Take the "trendy" places: Flour + Water, Farina, Cocina, etc. If you go there, you will hear Americans shouting "Sooo good! Delicious! Amazing! Soo tasty!", etc.
Reality is that if you take any random restaurant or trattoria in Rome, chances are you will eat something AMAZINGLY superior, for 1/3 or 1/4 of the cost. (then there are some tourist traps, and they don't count, of course. They're just a scam).
My 0.02.