I picked one up for $2.69.
I've had varying experiences with Sonic's pretzel hot dog bun (one time I got one that was hard as a rock) but it was very good this time around. It was soft and dense with a light pretzel flavor and the requisite chewiness. It held up fairly well to the chili and didn't fall apart.
The hot dog was solid with a bit of smoky flavor.
The chili is a pretty thick meat chili, which is usually the case for hot dogs. It's nice but a bit of a one-noter. Notably, there's no heat to it.
The cheese came in a decent amount and was nicely melted but I felt like a little more would have balanced the chili a bit better.
As you can expect, between the chili and the hot dog, it gets pretty salty and I found myself wishing for the optional mustard and onions for bit more variety.
Overall, while I like Sonic's Chili Cheese Coney and I enjoyed the pretzel bun, it's not my preferred pairing as the chili covers up a lot of the pretzel bun's qualities. I like a regular hot dog bun for chili dogs and just a plain hot dog to better enjoy the pretzel bun.
Nutritional Info - Sonic Chili Cheese Pretzel Dog (158g)
Calories - 420 (from Fat - 230)
Fat - 26g (Saturated Fat - 12g)
Sodium - 1230mg
Carbs - 30g (Sugar - 3g)
Protein - 17g