If your refrigerator doesn’t have an automatic ice maker, or if you just want one for something like a boat or an RV, these countertop model can produce upwards of 25 pounds of ice per day.
In terms of raw specs, all of the models on sale in today’s Amazon Gold Box are pretty similar. The two cheapest options are identical save for their color, and the more expensive ones can produce two different ice cube sizes, but are otherwise basically the same.