Here's the fine print.
For the purposes of the "Five Positions a Day Challenge" you are buying the full version of Chess Openings Wizard Express for Windows as a trial for just $5.
If for any reason you don't love the way you are increasing your strength in the opening in the next thirty days, you will email Mike and he will refund your money.
If you end up loving what you are getting from the challenge, in 30 days you will be billed $31. Then in 60 days you'll be billed the remaining $31.
The short version is that you must be thrilled with your progress or you get your money back.
But that's not all.
If you decide to get a refund then you still get to KEEP THE SOFTWARE. (After a refund you won't be eligible for updates and support. I can't be more fair than that.)
You might be worried that you won't get great value. If that happens I'll give you your money back. - Mike