We live in a very hard water area and as a result our kettle and more importantly our coffee machine is constantly getting heavy lime deposits. This descaler has brought our machine back to life twice now, and we've subsequently moved to bottled water.
We were about to bin the coffee machine and buy another one, but we thought we'd give this a go first. We're VERY happy we did. A great product and the service from CH has been exemplary. Top notch :)