As a general rule, always go local production. Fake "european" food is disgusting trash. Had some actually good local olive oil in San Fran for example, while the "Italian" Olive Oil was something exctracted from a fatberg i think. Local veggies were very textury and a bit flavorless, but not bad. Cheap restaurants are imho much worse than in southern europe but about as bad as northern european ones so if you're used to those you're good (extremely fatty sugary foods).
Good restaurants are good like anywhere else.
Good restaurants are good like anywhere else.