Compared with the coffeehouses of Portland and Seattle (where, according to local legend, the Daily Grind got its inspiration), this place falls just a little flat. It's attempts at west-coast hip have been tempered with midwest flair. For the region, however, it's one of the best for those suffering from a serious culture shock.
The Daily Grind has a decently full menu of coffee-based drinks (many of them are very sweet, be careful when adding sugar), and a list of sandwiches based on local streets. (The Upper 4th, for instance, is turkey with cranberry sauce, a supposed nod to the culture of the area of town, while the Nebraska Street is Roast Beef since the actual Nebraska Street is where the stockyards are. Kitschy, to say the least, though marketing may be difficult.)
For the area, the place is razor's edge -- they just got chai, for instance, for those looking for the next big thing in beverage consumption. Don't mention to the real M. Coy behind the counter that it's old news elsewhere. She gives withering looks that could put a chill on Hell.
Prices are reasonable for the area -- again, Sioux City is trying to assert itself as a megalopolis on the plains, and prices things accordingly. Persons from the coastal areas will find them roughly comparable to city prices, $6 for a sandwich, $4 for large drinks.
While staying in Sioux City, this is a reasonable facsimile to a coffeehouse, though it's not someplace to travel cross-country to see.