I have recently used cart2cart services to migrate my Magento Go store over to Magento Community and I can't say enough good things about them. This process proved to be a lot more complicated than I expected as I had an extensive layered navigation built into the back end of my Go store and other complexed data probably more than most. We came up against lots of data obstacles along the way in particular with attributes and attribute sets. Thanks to cart2cart they patiently worked through all the fine details and completed the task successfully. While they don't offer phone support, they have an excellent chat box support service and their staff were very helpful at all times coming back with prompt answers and solutions. In particular Oleksandr was extremely helpful and communicated clearly throughout the whole process. He showed a good understanding of the problems that small store owners are dealing with and had a positive attitude at all times, always with a focus to get fix for any situation. I will definitely use their services again. Thanks Guys.
Paul Gorman