Advertising slogan to avoid?

Alright, one last post before I go...

This line, from the side of a box of snack crackers, has to be the most non-committal commentary on a product I have ever seen!

"You won't know what you're missing until you try these."

Isn't that true of any item, good or bad?

"Jimmy-Bob's Pickled Pig's Feet: You won't know what you're missing until you try these."

"Dr Quack's Duct Tape Bandages: You won't know what you're missing until you try these."

"Zippi-Co Nylon Bicycles: You won't know what you're missing until you try these."

"Yellow Fever: You won't know what you're missing until you try it!"