This is a great theater. They have an extra large screen called the "Cine Capri" which is great, but you'll have to go to Arizona Mills for IMAX. Nearby bars are Bar Louie, Genghis Grill, and a few others--just search "Tempe Marketplace" and you'll find a bunch of places to kill the time before your showing.
You can buy the candy you want to sneak in from Danny's Car Wash (which has an attached Shell gas station and food mart) which is at the foot of Tempe Marketplace near the exit closest to get towards the 101 by Petsmart.
These guys also have the popcorn seasoning stations (don't overdo the seasoning) which is a huge plus. The bathrooms are clean, the seats are comfortable and you can pull up the arm rest if you're trying to get cozy with your date.
I've seen probably between 20 and 30 movies here and I would highly recommend this location.