Meh. I have a limited concert budget and an opener makes a big deal when deciding between a few concerts.
I understand completely, but I saw him a few summers ago with Train as the opener...needless to say they were awful, but it was totally worth it just for John Mayer: Dude killed it and he plays for around 3 hours. Just saying.
Anyway, I'll be going to the Allentown Fair just for this.