He’s played 140 games.
I’ve seen him play every game against Castleford.
Considering that four (and sometimes six) or the 12 teams play on TV every week, and Wigan feature more than the average, I’ve seen him enough.
Of course nobody can see EVERY player in EVERY game, but it’s possible to see enough of a player who has played 140 games to form an opinion.
I’m guessing you have an opinion on players who play for clubs other than your own. My opinion is that George Williams isn’t actually that good.

He's not the best in the world by any means but at 24 years old he has won 2 Grand Finals (played in 4), 1 WCC (played in 4) and played in a CC Final and 12 games for England (won 9/12).

How many other English halves can boast a better record than that at his age, or in their whole career?

Danny McGuire.
Rob Burrow.
Sean Long.
Leon Pryce.
Paul Deacon.
Just off the top of my head.

Rated very highly by Aus pundits including Andrew Johns. Wayne Bennett is also a big fan so Williams must have skills that engender such praise.

Believed that Canberra have offered him a 3 year contract.

Not bothered if he goes to be honest and I'm a Wigan fan ! Certainly not worth marquee money

Good stats Wigg’n from a good player, it’s a shame our lads are being lost to the NRL we are becoming a graveyard for ageing Aussies more than ever, while our limited talent chases the dream, you can’t really blame them.

On his day a truly great player but he seems to be having more and more off days lately. Could be a good move for him personally.

5 players who could've played well in the NRL. All except 1 has been retired for about 5+ years and all probably got called average at some point in their careers.

Aye he must nearly be as good as Ryan Bailey then

Trust me you ain’t alone..his acolytes worship him me I just see and good player and nothing more,thing is though I think he will go like a train down under odd as that sounds.

Agreed Sir. No doubt he will be replaced by a worse quality player because there isn't enough money in SL to replace with a star NRL signing.

Who did Saints replace Graham with?
Bradford replaced Sam Burgess with Nick Scruton.
Hull KR replaced Josh Hodgson with Shaun Lunt/John Boudebza.

Ah yes, because playing bench prop is as much a contribution as a starting 6.

By the time Bailey was 24 he was already a convicted criminal and had failed a drug test for a banned substance. He wouldn't even be let into Australia.