A zero-conditions guarantee is the most motivating, and the most persuasive.
[INDENT][B]Think of it this way:[/B]
If you saw a new burger joint in town that offered a $13 burger (not cheap, and considerably more $ than ever other place in town) that promised to be the absolute BEST burger you’ve ever tasted, or money-back, would you give it a try?
[CENTER]Honestly, if a huge banner hung outside said this:
[B][SIZE=“5”]“The Best Burger You’ve Ever
Tasted or Money-Back!”[/SIZE][/B]
Would you walk in and order one?[/CENTER]
Of course you would! (I chose burgers because studies have shown that hamburgers rank as the #1 favorite restaurant menu item for guys)
Now, imagine you’ve ordered one, sunk your teeth into it, and discovered that it is a really really really good burger, but maybe not better than the best burger you’ve tasted. But the presentation of the burger on your plate is beautiful and different, your waitress is really friendly, the restaurant is sparkling clean, the bathrooms are spotless, and the service has been amazing - quick and attentive.
Are you going to march up to the counter and ask for your money back?[/INDENT]
Give people an enjoyable, friendly, memorable experience when they have their windows cleaned by you, and they will NEVER leave you, never mind try and rip you off on a technicality.
It won’t happen.