Heh. Yes, quite a bit, though not usually as a standalone duplicator...though I have a few of those too.
Microboards did a customized run of these for Kodak, for use with their Kodak Picture Maker kiosks (g3 or g4, I think), where they served as a 50-disc Photo CD dispenser/writer hooked up to the main kiosk unit. For Kodak, the duplication controller was removed and the robot & cd-r drive interfaces were bridged to USB so that the kiosk could control the data written and activate the robotics.
They're a little bit finicky to load, but once you practice a bit, you get it. I use the Kodak versions for bulk CD ripping and it's generally problem free, as long as you load the discs right and the unit wasn't mistreated.