It's hard not to have mixed feelings... I don't care about the job he did at other places. Just off the top of my head, these are some games we lost with Chavis as DC, where a stop on the opponent's last possession would have won the game, but we allowed a game-winning touchdown drive of more than 60 yards instead:
'96 Memphis
'99 Arkansas
'00 Florida
'01 Georgia
'05 South Carolina
'06 LSU
Also, the decision to move DE Leonard Little to a stand up LB in '97 was bizarre. We took the best edge rusher in the country and stood him up. Dick Vermeil even commented on how dumb that was as head coach of the Rams (who drafted Little) ... but, we will always have '98 and that defense maximized what it had. So, like I said, mixed feelings.