Considering how much of my life I spend on my period, this has significantly improved my quality of life. I've been using these for about a year. It's the most comfortable menstrual product I've ever used. I can't say that this will be the case for everyone, but personally I can't feel it at all, it stays in place and doesn't shift with movement (it will when using the restroom but that's expected and happens with any product that's inserted) and I've never had it leak. And both tampons and cups leak for me. These have stood up to hours of hiking with no problems, something I wouldn't do during my period with pads, cups, or tampons. It prevents the menstrual related smell I hate, which other menstrual products don't. In my experience, it's way less messy and gross than any other option. I'm not sure how, but my cramps are significantly reduced. It's actually easy to forget I have one in (I don't reccomend but I have before at the end of my period!), or sometimes even that I'm on my period. With these I genuinely have been able to go out and do things without having to worry about being being on my period.