The Marquee is what it is. A venue for music. Red River Opry was the original occupants of the venue. So at one time it had rows of seats and theatre acoustics. But that is all but gone and there is a stage down and front two bars on each side with a slight downgrade from back to the front up to the stage. So it is cool in that regard that pretty much anywhere inside you will have a great view of the performers. Sound quality all depends on the acts ability to play live and how good their sound man is.
I've read in other reviews how people were patted down and taking their shows off. Well the pat down is done everywhere. I saw people taking their shows off but when it was my turn I was not asked to remove my shoes. So I think this might be something that people started doing on their own and others just assume that it is part of the procedure and do it. But I have never been asked to do it.
To sum up, Marquee is an adaquate place with sufficient ammenities. It is what it is.