It's quick, it's easy, and the price is terrific.Parallel construction! In a TV commercial! You know, I'm not sure I've ever seen that before in a case in which it would be so easy to get things wrong. Given that same set of points, 99 out 100 advertising people would have foisted on us:
It's quick, easy, and the price is terrific.What's wrong with that? Well, it implies either that "easy" is a complete thought on a par with "It's quick" and "The price is terrific" or that "It's the price is terrific" makes sense. Either "it's" applies to all three items or it applies only to the first one; it can't apply to the first two and not the third, at least not in that construction.
If you want "it's" to apply to the first two items and not the third, you need to close off that series by giving it its own "and":
It's quick and easy, and the price is terrific.That way or the Wal-Mart way -- either is fine.