Google shopping expert with magento

We use google base for our ecommerce website with google shopping and we don't have a huge success with google shopping. This is why we need an expert with google shopping. We can use any other magento extention like GoMage (or another extension or technique you recommend) to get our products listed correctly with Google Shopping. Please only bid if you have experience setting the new google shopping up We also need to be able to manage the feed so we will have to learn how to correctly configure the feed. ** Important: PM me the sites you worked and the one you had success with their keywords. Thanks Robert