I work in the legal field, and I wanted to have a USB drive that I could ensure was encrypted when I take client and confidential information back and forth between computers. I bought the IronKey and while it works well on a PC it does not work well on a Mac. Not to mention the OUTRAGEOUS price for a tiny piece of metal with a some memory inside! From now on I'll stick with products like Western Digital's Passport (500mb), for 1/4 the price and 16.5x the storage space, or the Buffalo Ministation 1TB (33x storage space, 1/3 the price). And both Buffalo and WD Passport are also AES encrypted and work wonders on Mac and PC.
There's simply no need to ever buy an overpriced piece of rubbish like IronKey. They should be ashamed they sell this drive for the price they do.