I like the phone system. Whenever we book, we always get a cast member who likes to chat about the restaurants, make suggestions for menu items or new restaurants we haven't tried yet, etc. The conversation with the cast member is one of the things that helps me get mentally prepared for the magic that awaits me when I arrive. Sure, booking online might be easier and more efficient, but I will still prefer the option of talking with a live, happy, magical cast member who is excited about WDW and helps me get excited about my upcoming visit.