I just did it the first week of August. I was told by the CM I booked it with, that they were consdering ending it by the October at first, but do to demand and popularity it would continue at least for an additional year.
I hope you get to do it! So many good treats, and it is nice to have a reserved area to view the fireworks. The only down side is having to secure space at the front of the balcony. Most tables do not have a completely clear view of the entire fireworks show.