I think I bought into the hype here that this was going to change my life. They are very well made, the function perfectly, stay in place, but on my heavy days I still leak. Every time.
I HATE tampons and cups and discs just feel terrible or don't work properly for me (I have been using them on and off for more than 25 years so this is not like a I am new to cups problem, they just don't work well with my anatomy) so I am resigned to just using pads. I always leak. I need A LOT of them to get through the heaviest day. It's a huge investment, but they work just as well as disposables ever did, so I am happy enough. I feel good about my choice to stop adding to the landfills every month.