Product review (4 stars): It fits, and works well for my Ikea branded Whirlpool
I bought this for an Ikea branded dishwasher that's made by Whirlpool, so it was the exact replacement.  So it fits, and works well.  My old one got holes in it. People in other reviews say that their old one had holes in the bottom because of knives going into it, but if you look you'll notice that it degrades from the bottom, not from the top where knives go in.  I'm hoping this doesn't do it again, if so I'll not buy again.