Product review (4 stars): A hopefully more durable replacement than the original
For those who are wondering whether this fits in the Maytag Quiet Series 300 dishwashers with three loading levels, the answer is yes.  It just clears the upper rack wash arm in a Maytag MDB8600, and works fine.  I would have liked the top plates to have been hinged like the old one, but that is a minor gripe.  My real concern is that the bottom of the basket does not embrittle and break like the last two I owned.  Whirlpool does not seem to be capable of supplying plastic parts that do not become brittle from the dishwasher internal environment, and we will see whether this is an exception.