I ate at HDHoF yesterday. They have 9 different types of dogs, plus a foot long, a 2 foot long, and a chicken sausage, plus fries, home made chips, beer, and soda.
I wasn't real impressed, but I am not a hot dog lover. The home made chips were wonderful, but the price of everything is high. ALL of the dogs (except for the foot longs and chicken sausage) are $6.99, which is not how I would price it. A dog with just sauerkraut (the New York, which is what I had), should not be the same price as a dog with pulled pork on top.
For a hot dog, chips (fries are the same price), and a small soda, I spent $10 with my TM discount. For a few dollars more I could have a great meal at Vivo or Antojito's. It does fill a niche, because not everyone wants sit down service, some people love hot dogs, and it is open for lunch.