Not the best, not the worst, but definitely fills the need quite well. DQ doesn't fall under the late-night category but it does fit my requirement of comfort and quick. All deep fried goodness, DQ burgers are better than the fast chains (McD, JiB, BK), and DQ uses a Frank's Hot Sauce.
Recent EPIC discovery upon my last visit: you can add hot fudge to the bottom of your Blizzard. BRILLIANT!!!