Hewlett-Packard Two-Sided Printing Accessory (Duplexer) for Select DeskJets/Photosmart Printers C8955A#A2L

Pros: The duplexer is easy to use, easy to set up, and a fairly cheap add-on.
Cons: None so far but I haven't tried odd-sized papers.

Just received this easy-to-use accessory from NewEgg.com for a great price. Basically the product does what it's supposed to do, print on two sides of the paper if you so desire. You must go into the properties section of the selected printer (in my case an HP 7350) and select double-sided printing.

There have been no jambs and it has functioned perfectly. I've been using it to print two-sided post cards and it has made my life easier as compared with manually swapping sides as I used to do.

Installation was a no-brainer. Just remove the back of the printer and click the duplexer in place. No screws, clips our snaps. Just a click and you're off and running.