Come here with someone you really REALLY enjoy spending time with...like a lot of time. The pizza does take forever and ever (even the 6"). I would suggest getting an appetizer while you wait, but we ordered the sampler, and everything on the platter tasted like frozen grocery aisle stuff. Nothing special.
Getting here is pretty annoying, but if you've got that nifty Nevada ID handy, take advantage of the free 24 hour parking at Cromwell and walk across the street. Don't park at Bally's/Paris just for this. You're better off spending that walk time waiting for your pizza.
The pie is good, but just didn't meet the overhype for me. Yes, Chicago style is different, but I've had better (and faster) here in town. I'll leave Giordano's to the tourists & diehard Chi-town evangelists for now.
I will say that our server Justin was on point. Best service I've gotten in Vegas in a long while.