Magento One Step Checkout is the best extension- with 100% Ajax, this extension helps website save 50% time for checkout, you can increase Sales up to 70% Checkout is often regarded as the most complicated part of purchasing process which accounts for about 70% cart abandonment. That's why the majority of your potential client will leave because of lengthy and time consuming check-out process. Magento One Step Checkout which dramatically simplifies the checkout process by combining all six steps into one and removing all redundant questions. Therefore, it will be your useful tool to increase your sales directly. Moreover, One step checkout Extension also provides many useful functions at checkout step.