We did it in 05 and it was a ton of fun, they had a few fun activities for kids, they were able to trick or treat through all the shops, it was really nice!
Then we did in 08, very crowded, too busy activities, and lines for trick or treating were ridiculous.
In 10, we didn't even bother, we did end up at DTD a little later on halloween night, and you could not even really walk around. We quickly left!
It just got out of control with way too many people, and I'm glad they are ending it. It was fun while it lasted, but DTD just cannot handle that kind of crowding.