Happy 3rd anniversary! Best invention ever - freedom in a little cup!
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.
You don't have to think about it, it's wonderful to go a whole day without caring about your period! Thank God for not having to use tampons!