This toothbrush could have saved me a lot of time, money, and pain.
I had electric toothbrushes, but I started using them before youtube. I.e., I didn't research how to properly use it. Just turned it on and brushed like I would with a normal toothbrush. Also didn't brush long enough (I thought that was part of the reason for getting an electric toothbrush). At the very least, the bluetooth syncing thingie would alert me to the fact that I'm doing SOMETHING wrong.
Anyway, now that a dentist told me the right way to use the Sonicare I have (don't use much pressure, just slowly move the head of the toothbrush across your teeth, paying particular attention to the spot where your teeth meet your gums), everything's much better. Well, after I bought a different dentist a new car.
This is what I use, and when the dentist asks if I'm flossing, he takes my series of grunts and gestures to mean "yes" and not "I did, once, a decade ago". He's happy, I'm happy.
http://www.amazon.com/dp/B00NL2AOPU/I paid $15, yours for a mere $10. Add $5 for two rechargeable AAs (I use Eneloops or generics, lasts longer per charge than alkalines). I used to have a standard model that recharged in the base, the batteries died before the rest. The older version of the AA battery Sonicare had some issues with water getting in the battery compartment, but they seem to have fixed it with this version. Still, the last version worked for 3-5 years. Had the newest version for a year, seems to be holding up fine.
Uses the same heads as the more expensive version, brushes just as well, has the same 2 minute timer. The more expensive model has a rechargeable base, can beep at your every 30 seconds (so you know to change quadrants), and I'm sure some other bells and whistles.