so I have had my electric toothbrush for 2 years now. I absolutely love it!
it cleans so well (like I've just left the dentist, every time)
it has a setting for whtiening, which is a little bit more aggressive than the regular one and a sensitive mode, a little bit less aggressive than the regular mode.
It stays charged for 4 weeks and when it does need to be charged it only takes 8 hours
they also have very good customer service, the toothbrush is covered by a 2 year warranty (or 2.5 years if you register!)

also comes with a travel case, the charging base has a cover on it that you take off to wrap the cord inside, and it takes different toothbrush heads that you can get at costco/sams for super cheap