Great idea, weird setup. I had to wait out on the sidewalk to get invited into the line to order my tickets. After 20 minutes in the sun (110 degrees, which is hot for a SoCal guy) I was finally invited in.
They are a little pushy, which didn't help. Due to heat exhaustion, I got caught up in the moment and bought tickets to Chris Angel that I could've gotten at the Luxor where we were staying. It would've been a little cheaper at the Luxor because we got a special discount book when we checked in. (I did get lucky as the seats we were given at the ticket office for Chris Angel were way better than what I paid for at Tix 4 Less).
Overall, it's a great concept, but just keep an eye open for better deals.