Went here for the first time a few weeks ago to see the Bush concert. I didn't go into the Casino, just stayed in the event space the whole time.
Its nice that there's a separate entrance to the event area. They don't force you to walk through the smoky casino. Security presence was nice to see and they seemed to just be there for the presence, not for any issues that night.
The concert area looks like your typical hotel banquet room, but with some racks in the ceiling for lighting and sound, and some bleachers against the back wall that can be pulled out when needed.
The let down for me at the concert was the "bar". It's not the correct design for this type of venue. They had tables set up in behind where they had pre-poured beer and the bartenders had to scramble around quote a distance to get everything for your order. So it ends up with slow service and warm beer.