I didn't go as I've seen this coverband version a few times and they are simply going through the motions. Credit to them - they still put on a better performance than most artists half their age.
Interesting observation. On the left hand side on stage behind Simmons position there was a black shower curtain type set up like a one person privacy screen.
From the front on position you had no idea what was behind it, but from my seated side on vantage point you could see there was a seat behind it and nothing else.
It was quite funny to watch Simmons quickly ducking behind the screen at regular intervals throughout the show for a sit down and quick kip.
Or maybe it was a grandpa power nap. 
There are not many bands that have been around for 40+ years that can still deliver a decent show that is worth the money. The Rolling Stones have been around a fair bit longer, but they tour once every 5 years. AC/DC, Aerosmith and Black Sabbath do the same. KISS have toured almost every year since 1973. They don't wear Jeans and a T-Shirt - they wear costumes, platform boots and amongst other things, breath fire and put on a spectacle that not many bands in history can compare. I can't them going on for much longer, but I respect their longevity and contribution / influence on my life.
I played my LE for 2 hours tonight. Switched off "work mode" and played pinball. I'd love to remove my obvious bias of the theme and hear other people's opinion..
