Title: Glad it worked for everyone else here
Product review: I have an HP AIO 7280 which came with the duplexer. That works great. I also have a Photosmart 8450 which did not come with the duplexer. In researching the potential to get one, I find this product which claims to be compatible. I quickly purchased it. Very easy to install. THe HP software for this printer immediately picked up the fact that duplex printing is enabled. So I tried printing a two-page document. Duplexer worked fine - mechanically. The only issue is that the second page printed upside down. In reviewing this on the Internet, I find this is apparently a common problem. In calling HP support, I was fortunate enough to speak to someone who was more interested in getting my email address than helping me with the issue, which is still occurring.Bottom line, check the Internet to see if your printer has issues with this accessory (or 'Accessoory' as the HP User Guide calls it).
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