Product review (5 stars): Awesome
I installed this about a month ago and am extremely happy with it.
Our water is very hard (12-14 grains/gal).  We did not want to install a whole house water softener because of how they waste water and dump salt water into the sewer during regeneration.

With the newly reformulated phosphate free detergents, our hard water caused issues with chalky white film being left all over the dishes, glasses, silverware and dishwasher interior.  We were wasting time and water having to rewash, etc. to deal with the results from the lousy reformulated detergents.

Installation was easy.  After I installed the Dishwasher Filter, with one cycle, everything was completely spotless even when using the phosphate free detergent.  I also verified the filter was softening the water using water hardness test strips.  Prior to entering the filter, hardness was 14 grains.  After the filter, hardness was 0-1 grains.

The only thing I am concerned about is how long the filter cartridge will last before it needs to be replaced.  I am guessing three to four months but will watch and see.