I am an adult with a small mouth and all of my wisdom teeth
Which is why I went for the kid's brush.  First things first: it's minimalist, it doesn't take up tons of room on my bathroom counter, and it's nice looking, I guess, for a toothbrush.  I like it.  HOWEVER,  I'm up to my third over the past 13 months because they just..stopped working.  The first one lasted an acceptable amount of time before it became (apparently?) possessed and starting turning itself on and off all day and night.  Not ideal.  I wrote to them for assistance, and it took them so long to get back to me I'd already tossed it and bought a replacement.  Do a lot of people keep dead toothbrushes around for 4 months?!  Second one worked for fewer than 2 months.  FINE.  They're cheap, so I got another.  Yesterday, #3 shuffled off this mortal coil for no real reason.  I mean, I brush my teeth for 4-5 minutes per day, x 7 days a week.  I don't think it's unreasonable to expect them to be able to handle 30 minutes of work per week.  I'm bummed, because we could have had something great together, but I'm switching to the Colgate Hum.
Rating: 3 stars