The dishwasher is so quiet the only time we hear it is when the water drains through the garbage disposal. The auto-venting feature is by far my favorite. The dishes are all virtually dry immediately after the cycle. I have found that the power zones are required for pots and pans regardless of how dirty they are. 

The only downside I've found so far is that you cannot _completely_ silence the chimes. There is a three-chime ping when the cycle is complete and the 10 minute vent cycle is about to begin. Its pretty quiet and not a deal-breaker, but that is the only sound you hear and prevents truly silent operation when running overnight.