I have not, but I will make sure to try it next time I'm in the area. They've been around since 1918, so I'm guessing they are doing something right. With all the great places to eat in that area, nobody would last unless they were really good.
I was watching a video on YouTube and the interviewer asked the actors what was the best food in New Orleans, and Domilise's was the first place they named. Check it out at 3 minutes.