Conclusion: The Lexmark T640n delivers fast performance for its price and engine speed, better quality for text and graphics than most monochrome lasers, capable paper-handling for a small office, and some notable conveniences, including the ability to print PDF files directly from USB keys.
Pros: Exceptional performance. Convenient printing of common file formats directly from USB keys. Includes network connector.
Cons: Photo quality is at the low end of the range for a monochrome laser.