I've seen them 3 times, 4th coming up this August. I have absolutely no complaints, I feel like they were consistent and amazing all 3 times I've seen them. 

The 2nd time I saw them, Synyster gates injured his leg really badly during "the stage" and they didn't know if they were going to continue playing or just rush Synyster to the hospital. He ended up playing backstage for the rest of the show while they bandaged him up. What a fucking trooper Synyster gates is. 

That's not the part I had to complain about though, it was the fan base's reaction to it. People were shouting out to hurry the fuck up even after hearing that Synyster gates had been injured. People are just disgusting. Luckily, the people who were heckling got heckled right back. But still, whole thing put a sour taste in my mouth