I know the trend in the industry is to offer these.

I am not in the stage of the game where I can offer it "Unconditionally".
(Money back, no question, no matter how long we've been training)

How stringent are your "conditions" in order to give the client their money back?

I like the tag line Gold's used a couple of years ago:

"If you're not completely satisfied, we'll give you your old body back!"

Hmmm, wonder if I can use that?