Yip I bought it too .. Always worked fine for me on every order eventually I had a call from a old customer saying they just could not get to checkout .. I looked it was fine ,do did it myself .. A few months back another customer called with same issue so I removed it as it possibly explained my high cart abandonment 😞 ... I now use the 5 page turned to 3 page checkout , it's brilliant on a pc but mobile ain't so great , but sales are coming though again. Had nothing but trouble with these modules as I have also tried datakicks 1 and doesn't work on my site either (no offence as it works perfectly on my other site) I just have added extras with costs and it doesn't add up right or show text