The movie theater is easiest to access by entering Sunset Station through the northwestern most entrance next to the sports book, taking a right into the food court, and following the signs to the back where the ticket selling booths are.
I recommend downloading the app and using it to buy tickets, rack up points, and be eligible for discounts. Assigned seating in large, leather recliners makes for a comfortable movie experience, but we found the theater itself muggy and quite stuffy during the 10:10p showing off "Baby Driver" we attended.
For the price, I still prefer Galaxy Luxury theater on Sunset. It's actually slightly cheaper - for tickets and food - with an easier rewards program and friendlier staff. And better climate control.