Wiktionary
worth every penny
a. (context idiomatic English) Completely worthwhile.
Usage examples of "worth every penny".
It may cost an arm and a leg for a cafetiere and a sticky bun, but it is worth every penny and they will let you sit there all day, which I seriously considered doing now as it was so agreeable.
It was costing more than she had anticipated but it was worth every penny.
The Armani suit had cost him a small fortune, but as he stood in the entryway he knew it had been worth every penny.
It had cost him eight weeks of his accumulated pocket money, but was worth every penny.