I have been using Huntington Banks online bill payment for the past three years. I am happy to report that I have never had any problems with it.
I have it set up to automatically pay my set monthly bills such as mortgage, car, and insurance payments every month without fail.
For non-standard payment amounts (credit cards, utility bills, etc.) I simply click on the "bill pay" tab and type in an amount. It is so easy.
The best part of bill payment is that it saves me so much time. I don't have to bother writing out a check, licking stamps, and putting it in the mail. I just log onto huntington.com and type in the amount that I want, and bamm...my bills are taken care of for the month!
I recommend using Huntington Banks Bill Payment to everyone I meet!