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Full user review
"Works, but no better than OEM software does."
Has level adjustments, can save to file or output directly to your printer. (Presumably) works with many scanners, including my 8-year-old Epson Perfection 1200U.
Line art scans (BW instead of grayscale) looked very coarse even at high DPI compared to my EpsonScan output. Cannot automatically open Photoshop to review/edit after scan, which I miss. Pricy for a one-note utility. Adds watermarks to demo scans.
My scanner drivers are now too old to use with Photoshop CS5 under Snow Leopard, so I downloaded VueScan to see if I could use it instead. While it does do what it is supposed to do, at least with grayscale and color images, it does not do what my OEM utility does, which is open an image editor of one's choice after scanning an image.
Also, when I scanned some forms in black and white, even at 300 and 600 dpi, they looked like low-resolution (72 dpi) scans in Photoshop. That's unacceptable. At those resolutions, text clearness should be pretty close to how you'd see it in a newspaper, especially when magnified to actual size. Color scans were pretty uneventful, and there are some capabilities for adjusting tone and contrast before scanning, as one would expect.
All in all, it's a workmanlike product but not a step above what you'd get with a scanner purchase, and if it does nothing beyond what you'd get for free anyway, what incentive is there to buy it?