Tried What's Up Dog today. See post below for other related info. I went with the "What's Up Dog," a (I'm paraphrasing the sign here) 8" classic New York City style dog. $3. Fries for $2. Canned soda for $1.
The dog was pretty tasty, good meaty beef flavor. It was a little blistered and blackened from the grill. The casing was a bit crunchy but I don't think it was natural animal casing. It wasn't nearly as snappy as, say, Cupid's (San Fernanado Valley, ca. 1985) but was more like you'd get from a supermarket dog when cooked for a long time. But I'm not sure. Classically spongy and white hot dog bun, though it looks like the sausages come on a more textured bun a la Top Dog.
Self-serve condiments include ketchup, mustard (yellow and spicy brown), saurkraut, pickled and sliced jalapeños, chopped onions, and relish. I didn't care for the saurkraut (rather bland) nor the relish (I like it sweet and loose, the more like fresh chopped sweet pickles the better, whereas this was barely sweet and clumpy).
Fries came out of a freezer bag, and were crispy, browned, and well salted: basically they did as much could be done with frozen fries.
All in all, I enjoyed what I ordered but I don't think I'll ever want to return for the same items.
They did, however, have other items that I may return to try. About 10 varieties of sausages (keilbasa, calabrese, linguisa, some vegan thingies). Chili and/or cheese dogs and/or fries. Garlic fries.