My Pfaff was purchased jsut because of the dual feed feature (IDT). No one else had that feature when it was purchased. It has been used continuously for a lonnnnngggg time! No problems and it really helps as both layers of fabric feed through at the same time. When I go batck to the FW, it is an adjustment without the dual feed and then the decision is whether to get out & use the walking foot. Like the Pfaff best. If you have a choice, go for the built-in feature.