Summary: At the recommendation of some positive reviews, I purchased 3 Strobe XP 450's about 3 years ago. I can tell you that I have had SO many problems - the main one being that, with all of the scanners, there is at least a 50/50 chance that after scanning one file, you need to restart your computer in order to start another one, as a message consistently comes up - "This scanner is being used by another application". I am ready to buy three different scanners and trash these.
Summary: Be VERY careful when purchasing anything from Visioneer. I have owned a visioneer scanner for about 4 years, and when I upgraded my PC to Vista, was shocked to learn that Visioneer considers it "out of production" and therefore no new drivers are available. In short, I now own a boat anchor. If you think you might EVER upgrade your computer, you might be better off purchasing from a company who supports their equipment.