I was massively sceptical as I'm very heavy my first few days to where I always wear tampons and pads at the same time and if I ever tried just pads to use during the night, I would have to change atleast once throughout the night and a tampon would always leak so again would always have a pad when using tampons anyway. But these (got the heavy flow ones) are bloody amazing. I can wear them throughout the night with no need to change and no leaks. They don't rub, I feel comfortable, I don't sweat in them, I don't feel I smell in them. They take some getting used to as because they are black, it's hard to tell how full it is but I'm finding I'm changing every 12 hours roughly as I only purchased 4 for my first try so I'm going to order some more to be able to do more frequent changes but honestly - they aren't needed for flow reasons....just more for comfort and cleanliness during the day. Also, they don't stick to your knickers obviously so you have to make sure it doesn't fold in when pulling your knickers up. But I genuinely love these and will ensure my daughter has some for when she starts her journey when she's older. If you have heavy periods - please try these. Just get a pack of 2 to see how you feel with them and you won't regret it to where you'll order more. Also - I've found my period hasn't been painful or had that heavy feeling at all this time. Not sure if that's connected to using the other stuff with all the chemicals etc but we will see.