we caught this last year, and my kids (6,9,13) all LOVED it. there were tons of activities and freebie give aways that the kid could "win." There were autograph sessions with athletes, which we didn't participate in. I'd definitely say that if we were there again during ESPN the W/E, we'd make a point to check it out. Here are some pictures from our trip:
http://www.kodakgallery.com/I.jsp?c=spwmv26.1igbt146&x=0&y=6n7gkt
Have fun!