For those of us that drink coffee like a fish to water,.....the big upside is........
You get a strong cup of coffee, using 1/2 the amount of grounds that my counter top drip unit uses. You can almost reuse whats in the percolator to do another complete brew drip, as the coffee just keeps recirculating in a loop, squeezing every bit of use out of your peculator's drip beans. That is something your average drip machine just wont do.
PS-EDIT:
Another way to squeeze the most out of a Perk n Bean drip, is to bring the pot to a boil, than let it cool some. You then put it back on the heat, and bring it up to a boil again. It is amazing how doing that lets you get even more out of it (strong) than a regular 'once-thru' peculator cycle, as it almost acts like starting from scratch. I use DARK ROAST, COSTCO brand (green/gold can-tin), as my preferred coffee.