Works like a charm !!!
Lowest prices! Best quality! Hello, sir!
Oh, hi. I'm just looking. I have a computer already.
How long have you had it?
Years. Works like a charm.
Years? What a dinosaur! I can't believe you still use it.
It's fine for writing letters and ...
If you say that something worked like a charm, you mean that it was very effective or successful.
Economically, the policy worked like a charm.