I have been to 2 events, Couture vs Gonzaga and BJ Penn vs Sean Sherk. I paid for the $300 range tickets and both times I had the time of my life. The crowds are intense and make you even more psyched up for a fight. There are somethings that you miss, like the clock so you have to look up at the screens to see how much time there is, and sometimes they can hit the ground in a weird spot so you use the screen again, but otherwise the view was awesome. Rogan often talks about how loud it is and you don't hear it through the TV too well, but live it is deafening. When Couture beat Gonzaga and stood up with his arms raised I couldn't hear my wife next to me cheering, it was insane.
Prices for tickets and items at the show are expensive, but both times they have been more than worth the money I paid for the memory of being there live.