I've only heard the hardware version in action once, when a freelancer came to my place, and in all honesty, I didn't like much anything that guy did, so I couldn't really tell if I liked it or not.
But I can say that the plug version is nice. To me, the Chandler and the Massy CT-4 are the only comp plugs that give any character.
"Sorry man I played guitar instead of going to school." -- James Lugo