We replaced our Bosch dishwasher after about 15 years of service and aeveral repairs. It worked great and cleaned in 90minutes. 
We replaced with the same Series 300. I wish I purchsed another machine. 
To clean as effectively one must select the 2+ hr heavy duty cycle and it also does not dry the dishes like the older model. I am fuessing that the new Series 300 is more efficient at the cost of being useful. 
It is louder and the spacing of each rack is wider making more difficult to load. 
Think twice before thinking the Bosch name is what it was