We were up against the wall on time amd looking for a way to migrate our data from Zen Cart to Magento. We are a small operation and most quotes for the data migration were way more than we could afford. But we couldn't run the risk of losing customers by forcing them to re register. The $50 Cart2Cart automated solution looked risky, but we researched the company and saw ALLOT of positive feedback about the service. Our Migration went perfectly. TWICE. We paid to move the data into a Development server, saw everything the service had to offer. Then, because the service is so stable, we elected to skip moving the data into Dev and then into production, and migrated again DIRECTLY into production (shows you how solid the service is). I recommend this service to everyone I meet that moving from one eCommerce cart system to another. I use it when I consult on other peoples moves. It's a silver bullet solution.
Brent Lucas