store credit -
At this moment the Store Credits gets applied only to the Order Sub total and not to the shipping cost. I think there needs to be an option to take off the final total as well.
Jonathan Shedden commented
I agree with this. I would like to add that the Store Credit extension needs to change from a type of coupon to a type of payment.
Currently when you limit the ability to "stack" coupons, this restricts the customer from using a store credit in conjunction with a coupon. A store credit should be a form of payment, not a coupon.