For the price and the amount of food you get, Sarku Japan has some solid teriyaki chicken and shrimp combination with mouthwatering teriyaki sauce! This is probably one of the best mall food options available and the food will fill you up. If you're feeling extra hungry, ask for double meat for a few bucks more to get even more chicken or shrimp.
My suggestion would be to try out just the teriyaki chicken or do a combination of chicken and shrimp. Keep in mind, the portion for shrimp tends to be on the low end, so you can basically count the number of shrimp in your food container. It does come only in a styrofoam take out container (which is not the most eco-friendly).
It usually doesn't take as long if there's a line and they're grilling food for others, otherwise it takes a bit longer if you're the first order of the day. For what it's worth, I'd say it's worth getting once in a while especially if you're hungry before or after shopping at West Towne Mall.