[This review was collected as part of a promotion.] I was honestly a little skeptical about this brush as I have tried different heads before only to be disappointed. This brush however was amazing, it did clean better and fit perfectly on my oral B toothbrush with no issues. My whole mouth, not just my teeth felt and looked much cleaner than before. It did not irritate my gums and the bristles were extra soft and gentle. Where my previous brush left gunk behind at the back of my mouth near the gum line, this brush head got it all. I love this brush head and absolutely will be purchasing this one in the future because I finally found the correct brush for my mouth.