Researchers, for the most part, suggest flossing as a very important addition to toothbrushing. In research carried out at our labs in Tel-Aviv University, subjects who said that they floss regularly had much less bad breath (as well as gum disease) as compared with those that said they did not.

It is important to use floss properly, following professional instruction. Remember to floss around the ends of the teeth at the ends of each row.
Children would probably have problems flossing, since it requires a delicate control of the fingers they don't have yet.

One of the great advantages of using dental floss or dental tape, is that you can smell the floss directly following each passage between the teeth, and clean the smelly areas more diligently.