Let me just start off by saying that the Tacoma Dome is a horrible venue and it is embarrassing to the state of Washington that it is one of the better places for big acts to come to. So much empty space in that arena. It is horrible and should be torn down.
Imagine Dragons were fantastic live. I've just recently started listening to them and this was my first time seeing them in person. Couldn't believe how crisp their music sounded especially on heavier songs like Friction and I'm So Sorry. Really good show I would love to see them again in a better venue.
My only complaint was the set list didn't flow very well and when the energy picked up for a song or two then there would be a pause and it would leave. It felt sort of awkward to me.
Radioactive at the end was as good a Live performance as you will ever see.