I've purchased this a few times over the last couple years, and used it on, as best as I can recall, four different Keurig machines (two at home, one at work one at parents' home).It works exactly as intended. If your machine is indicating a descale is required, this product, used with the descale routine, will clear the error.Or, you can just run it every few months, before you see the error light.I've found it makes the coffee taste fresher, and also, in my K-slim, will also restore the amount of water pumped through for each cup - even before the descale light comes on, I've found it pumping perhaps 10-11 ounces of water, for a 12 oz button press.It barely smells, doesn't carry any warnings that make me concerned about using in a food prep appliance, and the price, to me is reasonable.
Rating: [5 of 5 Stars!]