Haven't glanced through the reviews on the Marquee yet, but the acts it has hosted recently (and the price you pay for it) makes it hard to hate.
I had the fortune of seeing Childish Gambino and Minus the Bear so far. Both were excellent shows and super reasonably priced, I don't think I paid more than $45 a ticket for those.
Also, they got Ellie Goulding to do a show?! I know it's not a place for headliner acts, but stinking Ellie Goulding is impressive and its gotten me to check more regularly for shows there.