The KISS show was apparently boring to those who had already seen it, same old stuff for how ever many decades, but still a good watch.
I've heard the same from friends of mine that went.
It's the same setlist in main that they have played for 30+ years
It's a good setlist but if you have seen the band maybe 20+ times it might seem like nothing new.
I love them to death but even I find it a bit predictable.
I'm sure they had an influence on Ranmmstein though!
Seeing Ace Frehley do a solo show in London a few months ago was pretty magic though! (He played on Saturday at Download)