这句话严格讲是不地道的,原因在于动词think的用法。think作为动词,一种常见用法是think+形式主语it+形容词(+动词不定式)。因此这句话应该改为I think it good (to do ...).
更多类似用法:
I think it better not to try.
我认为还是不要尝试的为好。
I don't think it right to smoke in public.
我不认为在大庭广众之下是恰当的。
They think it worth reading times and times again.
他们认为它(这本书)值得反复阅读。