Elton John and Billy Joel Face to Face concert? ?

Has any one seen the Elton John and Billy Joel Face to Face concert? I am a huge fan of both artists and tickets are going on sale to this show soon in our area. I just wanted to know if they are still good in concert, I would hate to go see the show, and for them to be not so great, and ruin my love of them for life....lol. Tickets are pricey as well, just want to make sure its worth it.