Is This New Jenny Craig Ad Offensive to Obese People?

Jenny Craig is welcoming the ever growing-and-shrinking Kirstie Alley back into the family, but it's not without its bumps in the road.  Thanks to Kirstie's "circus fat" comment, Jenny Craig is drawing fire.

What do you think?  Offensive, or just someone poking fun at their own checkered past in regards to their own weight issues?