Forum Moderators: skibum
Also, to a degree, the longer that guarantee lasts the less likely the person will be to act on it as there will be less urgency and eventually they will forget about it. 2-3 months is a good length.
Also, what kind of feeling do you want people to walk away with. What do you want them to tell their friends?
- I wasted my time and money on that book
or
- I wasted some time on that book. But the merchant gave me all the money back. That's the kind of guarantee I like. No risk shopping experience :)