I bought this PSU to replace the 460Watt power supply as supplied in my dell XPS 8300 which I purchase on September 2011.
The box was organised with the contents well packaged; the instruction manual is incredibly lacking but if you use the OCZ website you'll find all the information you'll need. Note that there is no information about how to install; this is different depending on your case. If you need information on the XPS case I would be happy to send photos to assist.
When installing I replaced the PSU without connecting the extra cables; this I found was far easier with the restricted space. The cables are excellent quality and more robust in quality and firmer than the old PSU. I've run several POST tests to ensure the power supply works and no problems detected.
I would purchase this item for other PC's and would recommend to friends and family.