It doesn't leak at night as pads do, it's cheap and environmentally friendly, but mainly that it doesn't dry out my mucus membranes and doesn't contain bleach and pesticides that I don't want anywhere near my uterus.
A small revolution is what the menstrual cup is. No purchases, no smell. Freedom to just be for a whole day, no waste, always available, no chafing, no itching. Simply the best!
Hip hip hooray! May they improve all menstrual weeks for hundreds of years!