How do you say that was a good one in french?

Here are a few ways to say "that was a good one" in French, depending on the context:

Formal:

* C'était bien joué. (That was well played.)

* C'était une bonne blague. (That was a good joke.)

* C'était une bonne idée. (That was a good idea.)

Informal:

* C'était pas mal! (That was not bad!)

* C'était top! (That was great!)

* C'était marrant! (That was funny!)

* C'était cool! (That was cool!)

More specific:

* C'était vraiment excellent! (That was really excellent!)

* J'ai bien aimé! (I liked it!)

* J'ai beaucoup ri! (I laughed a lot!)

You can choose the best expression based on the situation and your relationship with the person you are talking to.