SMART Checkout Rules

I'm lost for words. Within 10 minutes of installing this app, Reymar (and his team) helped us do what i'd failed to find a way to do for nearly a week.
I wish i'd found this app sooner.
We have certain payment methods that can't be used for certain products for various reasons, but by setting up a tag in each product page, Reymar set up a rule to only use certain payment methods when that tag was found.
So simple.
Many, many thanks guys.