* Πολύ καλό (Poly kalo): This is a very common and versatile option. Πολύ (Poly) means "very" and καλό (kalo) means "good." This works well in most situations.
* Άριστο (Aristo): This means "excellent" or "first-rate" and is a more formal and emphatic way to say "very good."
* Εξαιρετικό (Exairetiko): Similar to "άριστο," this also means "excellent" or "exceptional." It's a more formal option.
* Φανταστικό (Fantastiko): This means "fantastic" and implies something is exceptionally good and maybe even surprising.
The best choice depends on what you're describing. For everyday use, Πολύ καλό is a safe and accurate bet.