The phrase 'it was good' is a correct and usable phrase in written English. You can use it to express that something was positive and satisfactory. For example, "The food at the restaurant was amazing - it was good!".
It was good timing.
It was good copy.
It was good.
It was good television.
"It was good, though".
"But it was good.
It was good fun".
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Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu