Product review (4 stars): Great system but no mounting bracket
The Difi Dishwasher Filtration System works great.  Pervasive hard water spots that we used to get are gone.  Ceramics and glass are shiny again.  Hard water deposits that had clouded some dark-colored plastics before installation of the filter system are still there but look to be diminishing over time.
I agree with another viewer that a little additional teflon (tape or liquid) is helpful on the brass fittings included in the kit.  I had a water leak on the "Out" side of the filter head after the initial installation.  A little additional liquid teflon plus tightening the fitting a little more stopped the leak.  No problems since then.
One deficiency - my system did not include a mounting bracket.  The system doesn't stand up on its own and I wouldn't recommend laying it on its side on the floor of the cabinet.  I had to fabricate an "L" shaped bracket in order to install the system in the cabinet under the sink.  Otherwise, great system.  I'm very happy with it.  Even more importantly, my wife is happy!