Product review (2 stars): You get what you pay for.  Cheap material!
You get what you pay for; a cheap splash guard and a stopper you probably don't even need because your old one is probably still functioning fine.  This product has a great low price and has a good fit for about 5 or 6 months but those are the only pros.  Now for my list of cons:  from the beginning I discovered that the rubber was to stiff to allow waste to pass the splash guard without pushing it through, sometimes very forcefully, with a spoon or other utensil.  Often times, it doesn't allow enough flow of water either and water frequently backs up in the sink too. Finally, it only continued to fit well for about 4 months and during the 5th or 6th month I started having problems with it falling through while pushing waste through it and now it just flips right over when running the garbage disposal even when I'm not shoving waste down through it.  It no longer fits correctly after 5 or 6 short months.  Lesson learned.  I will pay more for a better quality product that will last longer next time I replace the splash guard.  Which will likely be this week.