Product review (5 stars): Works great. No regrets. If your water is very hard, read on...
OK, this is a great unit, with one caveat. We installed it in an RV. The trick was to get the detergent and wash cycle correct. We wash big food particles off first, but otherwise just stick dishes into the washer.

We tried Cascade gel-paks with normal cycle and generic rinse aid (much like dish soap, to reduce surface tension of the water.) Conclusion: too much detergent for this machine. We have super hard water, and the dishes were clean of food, but with a grey powdery film left on everything.

Switched to normal dose of Cascade powder: same results. Then tried cutting the powder amount in half: no change. Then tried adding 2 tbsp baking soda: no change. Then tried the same 75 minute wash on another load, but with a 10 minute "quick rinse" cycle added on, _plus_ both detergent measuring compartments filled with white vinegar (40 ml). The detergent door was left open, because the quick rinse does not trigger the detergent door. Vinegar gets rid of calcium residue, yielding perfect results.

After more variations on the theme, including less detergent, a few drops of Dawn liquid, and adding salt, we settled on this: one rounded teaspoon Cascade powder, two tablespoons baking soda to soften the water, then run the 45 minute quick wash/no dry cycle. Open the door, add 40 ml white vinegar, then run the ten minute quick rinse.

That's it. Less than an hour, uses less energy, dishes are clean and free of residue. If we were going to wash dried-on cheese or other glue-like gunk, I'd do a longer wash cycle, but still keep that final vinegar rinse. If our water was softer, we'd have more options, but for now we're happy.