It's hard to look at a commercial for the Shake Weight and take it seriously. Ellen realized this and not only showed the commercial on her show but gave the ridiculous device to everyone in the audience.
According to Ellen, the Shake Weight is good for "working out muscles I have never worked out in my life!" (Take a look how it moves and you'll understand what she means.)
The creators of Shake Weight claim that "Ellen loves her new discovery." Oddly enough, however, they don't include a link to the clip of her show.