Please add punctuation to this: How often have you seen examples where enormous effort put into doing a job well has apparently been completely ignored by the customer the customer meanwhile has chosen instead to complain about an apparently trivial aspect of the product or service they have received

Punctuation version:
How often have you seen examples where enormous effort put into doing a job well has apparently been completely ignored by the customer: the customer, meanwhile has chosen instead to complain about an apparently trivial aspect of the product or service they have received.