I've always used manual toothbrushes and dentists continue to ask how I keep my teeth in such good condition.
I found some toothbrushes too soft or too large or had a badly designed head that didn't easily navigate to clean all teeth - fronts, backs, biting surfaces. But the Colgate 360 Degrees toothbrush (compact head, medium) is great. I don't have a large mouth and the head of this toothbrush is just the right size, gets to all teeth, angles easily because of its flexible neck, head shape and inwarded curved bristles. I also like the 'rough' textured backing of the head which automatically cleans the inside of your mouth as you brush your teeth.
I also use the bristles to clean my tongue and go lightly round gums. (Dentists advise not to press too hard as this can damage the enamel of the teeth and cause bleeding gums).
5/5 Sparkling Clean Stars!