I'll give you a hint, the company recently quit using the french version and started using the English translation you've found. So whose slogan is "It is so good!" It is a prominent American product, found in nearly every grocery store...
Hmmm... I don't know how to give you any more hints. This ad campaign has been around for at least a decade, and then when America started renaming French stuff (you know, like Freedom Fries) they changed the slogan to English.
The ad is usually a single woman doing some kind of light exercise, while eating this... which would require a spoon.