But, this thread is about the reusable k-cups. I've been using the same 4 reusable k-cups for about 2 years. I fill them with Trader Joe's coffee (beans that I grind myself). Good coffee, low cost per cup.
I won't buy a Keurig, although I have used one and it is convenient. It's just that, if you spend the money for a Keurig, and if you use 3 K-cups per day for a year, the money you have spent on coffee would buy you a new set of irons.
Besides, a $19.95 Mr. Coffee makes coffee that is just as good, and if you use Folgers or Maxwell House ground coffee, it costs about 10 cents a cup, vs 60 or 70 cents a cup for the K-cups. Do the math. If you drink 3 cups of coffee a day, at 70 cents a cup, that's $766 a year just for the coffee, not counting the cost of the machine.
And if you put your own ground coffee in a Keurig, what's the point? Why not just get a $9.95 single cup coffee maker?
70 cents for a cup of coffee doesn't sound like much, but it's 70 cents 2 or 3 times a day, every single day, that's a lot of money for coffee when a Mr. Coffee will give you just as good a cup of coffee for 10 cents a cup!
I hear you . When I used a traditional coffee maker, I would usually leave some coffee in the pot and later on have to throw it out. On the ones that had a warming base, if left unattended for any length of time, they would just burn off leaving a sludge in the bottom of the carafe. The same can be said for many of the traditional makers unless you get full blown expresso machine, Ninja, e.t.c. That is not a worry with the Keurig, except when you want more than that first cup, then you have to brew another. Even with the larger Keurig's that hold more water, they are still single servings (at least the ones I have seen). OTOH, in the case of freshly ground beans of your own choosing, the Keurig resuable is the way to go once you get the proper amount figured out.