love it very muchI love this kind of toothbrush. It clean better, and last longer than any other toothbrush I knowThese brushes really get into all the areas between the teeth that are hard to clean well. Your teeth feel so much cleaner!Love themThis toothbrush is effective but it HURTS!!! My teeth and gum have never been in so much pain and I am very gentle. It’s a great quality brush but it hurts way too much.my son brought them for me from Korea. I loved the long thin bristles that act as flossers. Very gentle but effective toothbrush. I bought them afterwards through ebay and I am delighted that they are available on AmamzonI try all tooth brush with diff. brand. This tooth brush is the best, clean your teeth and gum very well.do not discontinue this product please.