Product review (5 stars): Pleased.
Works well in my dishwasher.  Not a perfect fit, but my dishwasher is not a Whirlpool so I wasn't expecting such.  The two sides come apart with ease yet lock into place well to keep it as one unit if you like.  It is really handy that it comes apart, which is how I've been able to tailor it to just the right spot in my dishwasher.  The two larger compartments are just right for some of my larger utensils that don't fit in the basket that came with my dishwasher.  To me it would have made more sense for the top pieces to be half the length that they are and just snap on to the smaller compartments, to be able to use them with smaller utensils (to keep spoons separated and such) but still have the larger compartments open for large items.  No biggie, though; I just don't use the top pieces.  I'm pleased.