Excellent show and a must see in Vegas if you like Johnny Cash or Elvis. I'm a Johnny Cash fan and had to listen to lots of Elvis on the oldies station in The car as a kid. I'm not as up on Jerry Lee Lewis other than "Great Balls of Fire" and had never heard of Carl Perkins until the show. It's not just a concert, more like a play where they parts of some songs and all of some other ones. It's apparently at least somewhat based on a true story where they all got together one night. The guys in this show do a first class job, no bad cover bands here.
I enjoyed the show even though I'm way too young to remember those days. The older people in the crowd knew all those songs and could sing along. I stayed at Harrah's so got a half price voucher, pay the extra few bucks for the theatre seats or you might be turned awkwardly sideways at a table for 2 hours watching the show.