I have given this Dunkin multiple chances, and my orders are almost always incorrect. The customer service is consistently poor, and the manager's behavior has been the biggest issue.
One morning around 6:00 a.m., I tried to buy a pineapple cup, and the manager refused to sell it to me, saying I had to wait until 10:00 a.m. I drove to the Grayslake location, which I know owns the Fairfield location, and they told me that was not true and said they would address the situation. I'm not sure if anything was ever done.
When I called the Fairfield store back and mentioned that the owner knew what had happened, the employee who answered responded, "God, it ain't that serious. Come get your cup," and then hung up on me.
Between the constant order mistakes, the rude customer service, and the way customers are treated, this has been the worst Dunkin experience I've had. Management sets the tone for a store, and based on my experiences, significant improvements are needed. I will be taking my business elsewhere.