It is not very good. Bass is totally out of control. It is a quad mix, yet barely has anything in the rears. Real shame.
I don't care if it's not an immersive surround mix, cause it's a live concert, and live shows don't always have to be immersive surround extravaganzas for me, but if the bass is not good and tight, that is a real shame, but I won't make any judgments on it myself until I have heard it. (And I know at least one person who may be able to loan it to me at some point…)