First off, the strap system. Very customizable and extremely squishy, it's the best I've ever seen. The Woode divider is also the best I've ever used, though it does have a tendency to bunch up in the corners. The handle is secure and durable, and the Zipperless Ball Pocket and outside ball holder are both very handy. The water bottle holder is handy, and the scorecard slot is a great place to put my Frogger brush. The valuables pocket can be tough to open, but I'll take that if it means good waterproofing.
All in all, the best bag I've found, and I'm glad I bought it just before they discontinued it.