Mark D.
Yelp
I'll admit I'm not the biggest fan of DD after having worked there in my youth and having consumed too many donuts, bagel sticks and coolatas, but I still go to DD on occassion. This store happens to be the closest to where I live so I've been here about three times over the past two months
First, its a DD. Yes, there is always a line. Its a small store with offices and residents all around, so there are always customers. The line moves fast. Today I waited maybe four minutes to place an order and another three minutes to wait for my coffee and sandwich.
Not all their staff are well trained. On all three of the occassions the gentleman who makes the sandwiches had trouble understanding what the order display board was telling him. The first time, the lady making my order had to tell him what my sandwich was. The second time no one helped him and he got it all wrong (sausage egg and cheese no egg extra sausage turned into a sausage and cheese, so mostly right, but still cost me an extra 70 cents for that extra missing sausage patty). Today, the gentleman had assistance from someone else but he said to her oh that means extra sausage....
So. If you are coming here for coffee and a donut have no worries. Try to customize a sandwich, be certain to watch them like a hawk.