I love my 3 tiered dishwasher.  It has a flexible rack that can be raised or lowered to accommodate larger items such as mixing bowls or wine glasses.  In particular, I like that it does not have a heating element on the bottom - no more warped and ruined Tupperware containers and lids!  The front is very easy to keep clean, and I prefer this model as all of the controls are on the top of the door - not on the front.