Looking for feedback on extender and Auto Draft product

We are going to look into the 3rd party product to do payment of dues via autodrafts on credit cards or bank accounts. I'm wondering if anyone has any experience using Auto Draft by enSync Corp? If so,

How do you use it? Are you happy with the product and company support? Which version of iMIS are you on? Which features do you use? Have you found any serious issues?

 

Thanks!

JB