Currently we are running Magento v 220.127.116.11 and have a web store of 25,000+ products. We also employ Google Checkout as an option to our customers for check-out. In the backend we utilize the table rate shipping method which calculates the shipping charge based upon whether the item ships UPS or if it must be delivered by freight (common carrier). We charge a flat rate per order for items that can ship UPS and a graduated shipping rate if the item must ship via freight. The table works fine both in the regular Magento check-out and in Google check-out.
We also offer Free UPS ground shipping for orders totaling $59.00 or more for items that ship UPS. We utilize a Shopping Cart Price Rule Promotion to apply the Free Shipping based on the criteria: the order totals $59 or more and the item ships UPS. Once again this method works fine within the Magento check-out. The problem is that this Free Shipping Promotion does not carry through to the Google Check-out cart. When a customer checks-out via Google and meets the Free Shipping criteria, the Free Shipping will briefly appear in the cart and then it will automatically revert to the default UPS charge and will not offer the Free Shipping. We would like this issue resolved.
The Free Shipping not carrying through to Google Checkout is a known problem with the Magento/Google integration. I believe it relates to the API calls between Magento and Google check-out. We would like to find a developer that has experience with this issue and can provide a prompt and cost effective solution. If we find a reliable development source we will likely have future small projects that we need to address.