Originally I went about looking for a way to make coffee on the boat. Rocking and rolling while fishing, so the burner was out of the question. Regular coffee maker or kuerege required wiring, invertor, batteries, etc.....added up to almost $1000, That's definitely out of the question. 12 volt maker, they suck. So For under $200 I finally get to have coffee on the boat without burning it down and with $800 to spare ....sorta lol. But I agree at first it's a hit to the wallet, but it's the price of happiness, which for me is a hot cup of coffee in the water.
Definitely jump on the batteries, I'm sure they are knock offs but the charger couldn't tell the difference and coffee maker seemed happy with them.