Worth it for me. The sheer number of user-generated courses is fantastic, and creating you own course is a lot of fun, once you get over the learning curve.
My beefs with the game at this stage are simple: driving is too easy and putting is too hard. Maybe I'm dense, but I just can't seem to get into any sort of putting rhythm. I miss more 3 foot putts than I care to admit.
Loving the game though, and I'm sure it's only going to get better.