Seconded. I have the S1300 - it's slower than the S1500, but about half the weight and you can power it off of your USB ports, so there's no need to lug around

Seconded. I have the S1300 - it's slower than the S1500, but about half the weight and you can power it off of your USB ports, so there's no need to lug around the adapter. Great if you're scanning in multiple locations. I use mine both at home and in the office, and am delighted by the file cabinets I'm no longer steadily filling.