For the price you really can't complain but if you're expecting something better than dorm food, prepare to be disappointed.
My wife and I scored a discount on the AYCE buffet with our boarding pass cards and everything looked good from far away. Once I took my first bite, I knew right away that the cost of admission was cheap for a reason. The food pretty much lacked flavor - whether it was a taco, pizza, mac and cheese, or fries. Things you can't really screw up. The spanish rice that went with my tacos was dry. No bueno.
Service was about average.
If you want a cheap buffet, keep your expectations low and you'll be fine. If you want better, go elsewhere.