Product review (4 stars): Simple and effective
I got one of these when we replaced our disposal and now I can't stand not having one.  It's a scraper, a drain plug and a drain guard that keeps small items out of the disposal.  The number of times Mr. Scrappy has saved me from fishing stuff out of the disposal makes it more than worth the price -- and it makes a good drain plug too.  Will it change your life in some dramatic way?  No.  But it does remove some hassle and a few bits of clutter.  They last about one year with normal wear and tear, and I can't find them in stores.