Conclusion: The Fujitsu fi-4120C2 is small enough to fit easily on a desktop and fast enough to scan 25 sheets of paper per minute, which translates to 50 images per minute in duplex mode. The software bundle, however, is less impressive than the hardware; count on spending more for additional programs.
Pros: Scans at 25 sheets per minute. Scans duplex at 50 images per minute. Twain, WIA, and ISIS drivers let it work with virtually any program.
Cons: Confusing documentation. Little information on bundled programs.