Personally, Ive never seen one of these in the flesh, but I know that they are one of the most highly regarded modulars. Can't imagine what sort of work needs to be done to keep those patch sliders in working order, but it looks like an incredibly powerful system.
This video Lucky Zack Dagoba (OK, I made up the Lucky part, but lets face it, anyone who owns one of these is..) posts:
A small ARP ditty. A nice way to chill out after a late nite gig...
Eurorack module puts General MIDI sound set under creative CV control