Conclusion: The 3100cn is an absolute whopper at 16.9 by 16.3 by 18.2 inches, and it weighs a good 70 pounds with the second paper tray and consumables. Before buying such a printer, be sure you have the space and a desk or table that can support it. While the printer is certainly sizeable, however, it's mostly self-contained: You won't find the usual assortment of protruding paper trays, and it needs no space beyond its original footprint.
Conclusion: The Dell Laser Printer 3100cn offers good or better quality overall, including photo output that's in the top tier for color lasers, even though it lacks enough memory to print our photos in high-quality mode. It also gives reasonably good overall performance for the price.
Pros: Output quality overall is in the top tier for color lasers. Best performance for business applications in its price range. Offers both PCL and Postscript.
Cons: Did not have enough memory to print our 8-by-10 photos in high-quality mode (and boosting memory to handle those photos would add over 10 percent to the price).