Product review (5 stars): Ice Ice Baby, and Plenty of It!
One of the best camping purchases ever! For years I've spent up to $10 a day buying ice for the cooler while camping.  With this unit, you plug it in, fill it, choose the ice cube size and boom you get at least 20lbs of ice a day.  If you leave it plugged in over night, the ice stays cold.  I can't believe it took me all this time to buy one but it will pay for itself in less than one season of camping.
If you're on the fence regarding cost, just think of all the time and money you'll save by not trudging up to the store a few times a day to keep you cooler cold.