You NEED to know.....
Wow.  I bought this for my children to help them learn where they were missing when they brushed.  To help convince them to use it I tried it first.  This isn't just for kids!  Everyone should use these.  My teeth were great, but realized my tongue needs A LOT more attention.  My family's teeth (and mouths) are MUCH cleaner now.
Rating: 5 stars