It's actually a pretty nice product - though uncrackable is a bit of a
marketing spin.

It's based on a modified and zoned version of BSD Unix. It's not cheap
though for something with gigabit interfaces (one of the models is
basically at dull 1850 and they want an extra £1,000 to give it a
redundant power supply). Ouch!

A large corp would expect to pay something like £20,000 for a suitable
enterprise version.

They have produced a cheaper cut down version on basically a dull
celeron office pc which makes me laugh as it has an atx power supply
that won't auto power back on in the face of a powercut. Not good when
you admin an exterprise firewall half-way arround the globe!

All in all they are pretty good products and better than a slap in the
face with a wet fish...

HTH,

P.