Product review (3 stars): Good product, bad instructions
I used this to descale my Bosch dishwasher.  It worked like a charm!  Before using this we were getting serious spots on our silverware and the inside of the dishwasher door (they looked dirty!).  The only reason I am giving this 3-stars is because the instructions were not written for the American market.  It says to use the descaler on a certain cycle by temperature!  American dishwashers do not have temperatures listed anywhere on the appliance.  I had to go to the user's manual and then convert the Fahrenheit temperature to Celsius, and then just choose the cycle that seemed closes in temperature (Normal).  In addition, you are supposed to run the dishwasher for part of a cycle, then pour in the descaler and let the cycle complete.  I had no idea how to do this and the dishwasher ended up draining all the water out when I reclosed the dishwasher.  I was scared that I had just poured $20 of descaler down the drain most literally!  After the cycle finish, I was then worried because there was a strong smell.  After running another cycle, the dishwasher seemed fine.  It's been a few months and my dishwasher is back to working like it did originally.  Overall, the product worked as hoped but the poor instructions made it a bit stressful!