There were probably about 50 people there when I went, and if there had been any more it would have been too crowded. As it was, we had to wait in lines for some of the exhibits and the 3 point shooting was a 20 minute wait so we passed.
It was destined for failure. If it had been popular it would have failed to live up by expectations set by lines.
While some parts (Iike try to be a replay official) sucked, others like dunking (with pretty cool photopass) and the combine were both pretty great. I think we'd have done it again within 5 years if it had stayed.