I've been using the Collis Curve brush since roughly 1984-85 as an added brushing tool, typically in the evening when also performing flossing with the "before bed" routine. The brush angel scrubs off plaque at the gum line that regular toothbrushes simply do not perform.Consistent high marks with all my dental hygiene checkups through the years are proof of this brush's added value to mouth health, I've found.Highly recommend this product.Have been using collis curve toothbrushes for about 20 years.there is no cleaning to be done because the bristles curve into the gum line,cleaning thoroughly...when you use one you'll not go back to a regular straight line brush!!Hands-down best toothbrush anybody can use. I do use another more typical one with this one for best cleaning (brushing tongue also). But this one hugs around the teeth and gums so it gets where it needs to go much better than flat-bristle heads. Great item.These are excellent. As a dental hygienist I find certain people really benefit from this design. They are harder to obtain now tho. My 94 year old Mom finds them very easy to use and she gets a wonderful result...We use these toothbrushes with our students who have Autism. The Collis greatly reduces the number of steps involved in brushing your teeth . My only complaint is that the toothbrushes don't last very long, the bristles tend to get misshapen and ruined within a month or two.as advertised with quick shippingThese tooth brushes work really well! Hygentist recommends being very gentle using this because it really does clean under gum line. If you're heavy handed don't buy it. My teeth are clean!!!I have a daughter with multiple special needs and this toothbrush is a Life - and tooth saver! She always has great dental checkups and it's quite a challenge to get in there to do a good job. I'm Very grateful for this product!