As someone with some experience learning foreign languages, I agree. Rosetta Stone is too expensive for what you get. Learn in Your Car is better for adults, although you do have to listen to them a bunch of times. Our library has Muzzy in French and Spanish and this is good, albeit a bit limited and fairly expensive. If your library has it, however...
The learner.org online programs are great, especially the French program. And free.
As for why RS is so expensive, what other books or learning programs do you know that have their own kiosks at airports and run numerous ads on television? Or Michael Phelps as a spokesman, for crying out loud. That's what you're paying for, not efficacy as a study tool.