Ohh lol I've used them for that as well. I've heard good things about using them that way but I didn't have any luck with it myself. Tho I did only use them for 2 months.
I have and I love them although I can not use them the first 2 days of me period as I bleed heavy those days and would end up leaking. After that the they worked perfect. It'll take a little time to get used to them but once u got them its amazing and they don't dry u out like tampons.
Lol this is kinda tmi but she said that sometimes it was hard to get out and she would have to dig for it but it could have been the way she inserted it