As for how good he was, well at his best in 2003 he was the best in the world.
I seem to remember him being disappointing in the earlier games in the 2003RWC and his reputation being built on the last couple of games. In fact the more I think about it, England struggled against Wales until they brought Mike Catt off the bench. While JW kicked the points he couldn’t ‘create’ enough to beat Wales.
Laud him for what he is.
What he is is the second highest international points scorer of all time, second only to Carter who is up there as the possibly the best ever.
And Neil Jenkins in third. Shows how silly it is rely on dodgy stats!