My biggest issue was the fact the panelists for the Advanced Costuming panel never showed up. Full room waited for almost 15 minutes before staff came in and announced the panelists couldn't be contacted, didn't know if they would even show, and for us to just do a panel ourselves. While it was cool to hear how others did their cosplay, it was a HUGE let down.
There were some other panels and events I wanted to go to, but wonky scheduling made it very hard to do so.
Other than that, I enjoyed my time this year and plan on going next year.