BE AWARE. They try to steal your money through their own checkout processes and do not admit to their mistakes. We have tried to make this app work for the past ten days but only with issues.
It does not work well with some other apps we have on our store and worse, when we disabled all functions and removed the upsell offers. When reaching out to the support staf we've been told we could not be reimbursed.
There are better after-checkout-upsells apps that this available, do not use their apps that make your website slow and steal your hard earn revenue!