I'm having a laugh reading through this. Amazes me how people who've never used one have such fixed ideas of what they are like to use!
A moon cup holds about 20ml of blood, which is about three times that of a super plus tampon. The usual range of blood loss over the whole period is 10-80ml with the average being 35ml. So generally you won't fill it up, even if left in all day. It's surgical silicone and it holds the blood away from you so it's clean and safe - I'll sterilise mine when you sterilise your husband's penis or your disposable sanitary wear.
There's no noise, bit of a popping sensation sometimes but it's inside your body so something only you are aware of and it doesn't make a noise coming out. Not sure where anyone gets that from 
It's a flexible cone, 5cm, you pinch the end of it, so far away from the blood, and pull, it comes out with the blood still inside and you tip it into the toilet - not the sink??? If you have a water supply handy you can rinse them out or you can use tissue to wipe them through. They only leak if you keep them in beyond 20ish ml, which for most people would be a long time!
I hated the amount of blood I got on myself with tampons and towels. I always got blood on my hands, in my hair, on my legs... The first day I used a cup I changed my tampon before leaving the house, got to town (about a mile from my house) went to the toilet and my super plus tampon had already leaked and was starting to move, my clothes were covered. In the 16 years I used tampons I don't think I ever really managed to do it without touching blood. The worst thing about having children is the 6 weeks of towels! I hate the blood going everywhere. I hate it on my skin, in my hair and in my clothes. It doesn't matter if it's one day from birth or four weeks, however much I lose I still have to come into contact with it far more than when I was ill and losing 100ml a day whilst using a mooncup (which I wouldn't have been able to know or tell my GP/ gynaecologist if I hadn't been using).
TrustMeImANinja have you spoken to your doctor? That's a massive amount to be losing. When I was at my worst (100ml a day for 12 weeks!) I was changing it about 4 hourly, a little longer at night. I had to be seen at the hospital because it was quite a significant amount that the GP wasn't happy to deal with it.
Why do people keep saying it gets tipped down a public sink??? What do you think we do? Come out of the toilet with our pants around our knees, tip it out in front of everyone and then go back into the toilet to finish off? Or maybe we're back onto the other popular MN conversation - accessible toilets!