Traded in TW2007 for this and I'm glad I did. Something wasn't quite right with TW2007, but this version seems a lot slicker and entertaining. The Tiger Challenge has veen revamped, with the challenges made up of a mix of short scenarios (3/4 holes) and rounds for the "bosses". New mini-games have been added, the menus have been improved, as has the online "GamerNet" side of it. You can now upload your best shots and challenge others to beat it.
Also new in this version is your golfers shot confidence, showing how confident he is on playing the shot based on previous similar attempts. There's also the introduction (return?) or the 3-click swing if you prefer the Hot Shots style, and a Game Face feature, allowing you to use a photo or webcam to put your face on the golfer. Haven't tried that yet, so not sure how well it works.
All in all, for me this is a big improvement over 2007. Not perfect - still a few graphical glitches (and you still cant skip the opponents shots) but getting there. 8/10 for me.. 8.5 if it was allowed!