Bloody formidable when you read it like that, looking at the win % is insane. You'd never sack a coach like that in this era.
For comparison, Hardwick:
307 matches ('10'-23)
170 wins
131 loses
6 draws
55.37% win rate
Finals
16 matches
10 wins
6 losses
62.5% win rate
3 grand finals
3 premierships (17, 19, 20)