Awesome free online golf game

I came across World Golf Tour the other day and couldn't believe how good it was. It allows you play realistically mapped courses including Pinehurst, St Andrews etc. The graphics are miles better than any others I've seen. And it's free. I still can't find the catch.

 www.wgt.com

Anyone playing feel free to join Matt Holbrook's Game for a little golfshake tournament!!

Too be fair it is pretty awesome for an online game.  The putting is hard though - or is it just me?

Putting is very hard!