I am local to Anaheim and could easily attend but I just don't think I would enjoy it. It seems to be a LOT of standing in long lines, being in huge crowds of people and in the end, you can listen to the panels (or at least highlights) online in the comfort of your own home and get all the same information. There is so much live media coverage of this event on Twitter that it's easy enough to follow all the breaking announcements.
I tend to get overwhelmed in large open spaces full of people. I get overly hot and a prone to migraines, so that's also a huge part of it.
I know MY kids would absolutely hate it. But on the other hand, many kids really love conventions.
It's really about your own personal tolerance for the convention atmosphere, because this particular convention is a BIG one and you have to be prepared for everything that goes along the that.
It is also VERY expensive, and I struggle to see the value in what you pay vs. what you get.
It will be in late August in 2019. Late August is typically very hot in Anaheim. You will spend a considerable amount of time outdoors in lines, so take that into consideration.