I was very impressed by the customer service at the Smith Center. When I went with a friend, we had mistakenly purchased and printed out tickets for the wrong date. The manager was very helpful and quickly fixed our tickets for us, though the tickets weren't as great of seats but I figured that was fair enough as we were still In the same general area.
For drinks, you can bring your purchased beverage into the theater if you buy the souvenir cup. Added perk, if you bring the cup back to use on your next visit, you get three dollars off your drink!
Plentiful parking but if you valet, I do have to mention that highly impressed by the work ethic of valets. I saw one sprinting full force across the parking lot to get someone's car.