I love these things. Two events a year that fll YouTube with hundreds of hours of content that's great background fodder.
There's been a ton of games I've never heard of that I discovered by seeing at these events.
Not every one is a winner. Some people just aren't good presenters, some games are just not interesting. Whenever the charity is a cancer foundation, there's tons of depressing stories that come through the donations that bum the mood. There's the occasional drama that happens with any sort of large organization.
But overall those are minor issues on what is otherwise a great time.