within the 30 day trial period, ... ask for a refund ... plain and simple

>- when users realize that

If it does not make the customer happy within the 30 day trial period, all they need to do is ask for a refund of the purchase price. We are very fair about it.

If they want to extend the trial period, all they need to do is call a couple of days before it is over and ask. We are generous and reasonable.

Plain and simple.