Been there the past 5 years and sorry to say it looks like I won't be able to make it this year. Got a big conversion at work and by it being a week later than normal I'll be out. Main reason to go are friends and competition. There are not many places (other than Worlds) that an Am can go for the level of competition this tourney offers. This is also an event that pulls in so many familiar faces that you may only see here or Worlds.
Courses are good - I really like Kereiakes and not a big fan of Phil Moore (to each is own) but each course in the current layout serves a purpose in balancing the field between distance and accuracy. It takes both and the current 4 course layout (Adv/Adv Masters) gives a very nice balance. Not a big fan of the Final 9 location from the past couple years but decisions need to be made by someone and it probably serves a purpose in some way.
Definitely worth experiencing - And as others have stated, it usually comes with a very nice players pack.