Went to the Tiesto event here in Feb... Not sure how other nights may be but this is my experience:
I had will call and it didn't take me a long time to get my tickets and get into the venue. I did go at 10:30 though so I'm not sure if it took longer later on. The 2 opening DJs were pretty good and did a good job at getting the crowd ready for Tiesto! The bars were pretty easily accessible and it didn't take a long time to get drinks so that was good.
The venue is AWESOME. It's a BIG music hall with LOTS of tables... I feel like if they took out the whole first row of tables and made the dance floor bigger it would have been better because the dance floor def got pretty crowded around 12 and I had to move to the side to have any space to dance.
When Tiesto came on it was just CRAZY. The visuals, music, everything was just really AMAZING... There are a lot of surprises so I won't spoil it for you all. If you like trance/house music or if you like Tiesto, you have to go see him. I think he's the resident DJ there and will spin once a month... This is DEF A MUST!