I am on my second. I won't go back to a regular toothbrush. I'm not sure which model I have, but I made the mistake of not getting the same model as the 1st--I miss one feature in particular: it breaks up the two minutes of teeth brushing into 4 timed intervals. You're supposed to brush one section of your teeth, and when it makes a little noise, time to move on to the second. Sorry I can't remember what this feature is called, but I'd reccommend it. I believe mine were in the $80 price range.