meh
I ordered the two pack. They're labeled with expiration date of 11/30/2016, so they're already expired when they shipped them to me.  Now, I figure an expiration date isn't set in stone, they'll probably be effective for a little while past the expiration date, so I'm not gonna bother trying to get a refund.  The paste is ok, the mint flavor isn't too strong (strong mint flavors burn) just been using it a couple weeks, BUT, when applied to the sensitive tooth, ZAP!  pain - this tooth responds to temps that don't have to be ice cold, just room temp liquid will do it.  So, I get the paste on the gum first, to warm it a bit, then onto the tooth.  It's too soon to say how effective it is for the sensitivity yet.  Just heads up y'all regarding expiration dates and sensitivity to application.  Not using the toothbrush, can't comment on that.
Rating: 3 stars