I remember watching this on FOX and the best part about it is the archival testimonies of then-surviving passengers of Titanic. It doesn't get more real than this, hearing first-hand of what they saw and experienced on that fateful night. Also in the special is of course cast interviews and behind the scenes stuff.

As for the rest of the Bonus disk, it has what you would call fluff DVD bonuses that just rehash what you have already seen. But there are a couple of cool extras that are worth checking out, especially the time lapse construction of the replica Titanic that took 100 days to complete, starting with digging a hole in the ground all the way to the last rivet of the Ship. It's amazing what a group of people with the same objective can accomplish together.