With the Mirena IUD I no longer menstruate, just a little spotting, but it causes regular discharge. No kids and my vaginal muscles are pretty tight so I got a smallish diameter cup for daily use. The Meluna medium is great: I can't feel it and it's not so small that it leaks. Normally my cervix is pretty high but lately it's been hanging out further down, and the cup fits either way.
I like the ring stem, it's comfy and easy to grab onto. I have osteoarthritis so can't use many folds, the C fold works well. Occasionally it's hard to get the cup to pop open but "jiggling" it up and down or pushing on the fold helps pop it open. I remove, wash, and reinsert in the shower and find that squatting is my best insertion "pose."