This is how I’ve been brushing my teeth for the past 9 or so years. I tried the original adult version and the one with replaceable heads, but I’ve stuck with the«Kidz» version. I get that the extra bristle area is for your gums, tongue, etc., but the adult sizes are just too much in my mouth. #thatswhatshesaid I like how the kid ones can fit in regular toothbrush head cases.( ) I just wish the kid ones came in black like the adult models. There was a time in my childhood when black was my favorite color; I needed a black brush back then like I need it now.