Summary: This scanner is amazing. We have it configured to scan 200 dpi color and it just flies through stacks of paper that are all sizes and thicknesses. As long as the 1/4th and 1/8th sheet papers are aligned at the center they never get missed. The ultrasonic double-feed connection is working extremely well too. We've tried all kinds of things to fake it out but it has always successfully detected double feeds. Clearing jams and double feeds are a piece of cake.