I introduced some nany friends to the mc and they have all had postive experiences.
I have endo and clotty 10 day loss and it has helped as it was pads only before the mc.
Several friends with light loss but cramps have seen a loss or reduction in cramping on switching from tampons to mc.
I have scuba dived in mine with np problems.
T M I ALERT ^
As to loss, at the start when i know it is due, the mc is often filled with a mucusy liquid, that then becomes red blood and tails off to brown liquid and finally back to the mucusy stuff with a tinge of brown.