We went last year for the first time and I just booked it for this year. We were really pleased with this event and are bringing the "kids" (20 somethings) this time. As pp said, you can get unlimited food/beer/wine with a causeway pass or buy the $50 book of tickets. Since I had the bracelet, I did not pay too much attention to the ticket requirements, but from what I recall most were 3-4 tickets, with the Shula booth requiring 6 tickets. If your teens are big eaters, I would do some research. My boys as teens could have made the bracelet worth it without any alcohol!
We did the beer garden last year but probably won't this time. Beer, sausages and pretzels are just too filling when there is really fantastic food out on the causeway! My oldest son and husband are big craft beer people and think the offerings of beer on the causeway are enough. The beer garden is a lovely setting though. I wish they would do the beer garden as a separate event. I would attend both!
We were really pleased with the quality of the food. While the lines might look long (not as long as weekend lines at F&W at Epcot), these lines move so fast as most patrons have bracelets, no money is exchanged and the guest just grabs a plate and moves on. I don't know how they mass produce food of that caliber, but most everything we tried was fantastic, hot and fresh on an unseasonably cold FL night.