English time- worked like a charm

Works like a charm !!!

Salesman

Lowest prices! Best quality! Hello, sir!

Buyer

Oh, hi. I'm just looking. I have a computer already.

Salesman

How long have you had it?

Buyer

Years. Works like a charm.

Salesman

Years? What a dinosaur! I can't believe you still use it.

Buyer

It's fine for writing letters and ...

Explanation :

If you say that something worked like a charm, you mean that it was very effective or successful.

Example :

Economically, the policy worked like a charm.