We get these offers twice a year from our credit union. The catch is they charge you $25 to do it! We have always paid extra on our mortgage. Genius, because if you have to skip a payment or 3, you can without penalty or having to pay the $25. They just extend your loan for the payment you miss. Win-win for them, they have charged you $25 to do it, plus the extra interest they get by the loan extension. Not happening....if you can add extra to your payments it's kind of like insurance if you have to occasionally skip a payment.