The good: Well, one of my personal favorite Pokemon is this suave mofo, but that's neither here nor there. Electric types are reliable team members: They're fast as - well, lightning, they hit hard, and they can take a few knocks before they're done with you. Paralysis is a great status to use with an Electric type because they get in fast and can work with pretty much anything but Ground, the only type to which they are weak.
The bad: Electric types are not bulky enough for comfort, so they do require proceeding with caution. And the more bulky Electric Pokemon lose the all-important speed element, which kind of defeats the purpose of having one in the first place. And there's the fact of Pikachu being part of this group. Look, Pikachu (or Raichu) isn't a particularly bad Pokemon, but it isn't a particularly good Pokemon, either. It isn't even particularly cute: Eevee, Vulpix, Charmander, Squirtle, Bulbasaur, and Growlithe are all way cuter than Pikachu. Heck, they're all way cuter than Pichu. Pikachu may be the poster child for Pokemon, and that's nice, but it's contributed to a generation of people believing that Pokemon is chiefly for girls under the age of 7. To those people I say: Would a 7-year-old girl use this on a team? I think not.