I knew Frank when I interned at the FM station and he was on WJR. Always nice to me (and trust me, not every radio personality was nice to the interns). He was also smart enough to not take the Tigers radio gig after Ernie got fired. He knew that person wouldn't have had a chance. Can't say I agreed with his politics and he stepped in it badly a few years ago.
I thought he was good at play by play for both Michigan and the Tigers, but the standard is Ernie Harwell and Dan Dickerson and that is a very high standard.