He's never shy of an opinion or two and up to this point has called exactly what is going to happen in each of the big games.
This week on Sport Wales, the former All Black scrum-half Justin Marshall gives us his Rugby World Cup quarter-final predictions.
Does he think Wales can beat South Africa? Or what about New Zealand against France? He may surprise you.
You can watch more from Justin Marshall on Sport Wales on Friday, 19:00 BST on BBC Two Wales and online.