Weird.... we were just chatting about this a couple of hours ago!
Yeah, we tried it out a few years ago for our CRJ fleet. It's an interesting troubleshooting tool. My employer didn't care for it much though, so it faded away.
Later, I was somewhere in the U.S. (can't remember where now), and talked to a A & P that used it for their RJ's. He rather liked it. It will usually point you in the right direction for a "fix".