Both gateways are owned by Intuit, but the Qucikbooks Merchant Services (QBMS) gateway is the one primarily supported, especially within the context of IDN. The QBMS SDK also has the added benefit of having a more seamless integration with QuickBooks. In the response xml, we send back information that you can send to QB via the QB SDK. That information then lets QB determine which transactions to match up when reconciling. Smith Cart is integrated with both the QuickBooks Merchant Services (QBMS) gateway and the Innovative gateway.