Product review (5 stars): Great DIY product, better than paying the plumber for 1 hour.
I bought two of these.  They are very easy to install after cutting out the remains of the old folded version that came with my unit.  I do not notice a difference in the volume of the unit when operating as some other reviewers have noted. If there is, it is negligible.  I like that it can be removed as easily as it was installed so that I can clean it. I haven't put it in the dishwasher as others haver suggested, don't think I will.  I installed this with the edges facing up so that my stainless strainer basket fits nicely in the drain.  I would buy again and just may purchase a couple more for spares, should the need arise.