AusPCWorld has made a review of the MacPower Digidoc 5,
This neat device, monitors temperature, turns on your fans when its needed, and looks very cool! :
Overall this is a device that appeals to the hardcore PC user, someone who wants to make sure that their PC is kept cool and running at its best at all times. The DigiDoc wouldn't really be needed for the normal every day PC. This device would fall into the category of wanting to know what exactly goes on inside your PC at all times. I know for a fact in the past with the Asus Ipanel device on my Asus Motherboard the ability to tell exactly how hot the CPU is, or the inside of your case can be handy at times. Just knowing that your PC is not running really hot and has the ability to turn on fans if it does keep your mind at ease, especially many of us with extremely valuable investments being used heavily on a daily basis.