Product review (2 stars): Underpowered Bosch Dishwasher SHE3AR56UC
This machine (Not the Black Ascenta, BTW) and Bosch service have been disappointing. It cleans very sparkly as long as the dishes are basically clean before they're put in. Otherwise, not so good.
  I hooked it up as instructed to existing plumbing. Frequently, but not always, it did not drain. I contacted Bosch who provided the names of local service people. The first guy said there was a piece of something stuck in the drain tube. There had never been a problem with several previous makes. A week later, it again failed to drain. After hand-draining several times, I called for service again. This guy rerouted the drain tube under the sink, saying it needed to be higher. It was as high as install instructions required and as high as previously functional. The next day it failed again. This went on for quite a while, working, then failing, then working. I told Bosch I wanted a replacement. The service person I talked to said the hose needed to be rerouted behind the unit. I did this, with justified doubts. It failed again. I again told them I wanted it replaced and they insisted I had to have another service call to begin the process.
 I tried a different service provider. This guy finally came up with an answer. To meet energy saving requirements, newer machines (including Bosch) were using smaller motors. He said the connection where the hose tied into the plumbing was now too small and needed to be larger for new machines. I would have to do that myself. He charged me $75 for a solution that should have been included in the instructions, and certainly shouldn't have taken nearly 10 months of frustration to uncover. The larger connection cost me about $3 and took a half hour. Had Bosch provided this information initially, they would have saved me a lot of time, frustration and $75.
The machine now drains, but remains underpowered. It does not remove food particles that have set., and does a random job at removing oily (salad or cooking) residue and small grains. In short, it does OK if the dishes are basically hand-cleaned before use.