Ok, bought mine [mooncup] at Boots £19.99
Very heavy times, just empty every 60-90mins you'll soon see if it got be longer btw empties.
Clots, oh yep no probs i have some humdingers and it has no prob.
Changing in WC, i have water in my bag always to deter me from buying a coke while out and about so i just use a little of this, a small pack of baby wipes or some waterless soap means you don't exit cubby with red digits.
Lochia, not the best idea as everything needs to settle down first, plus altered shape so could shift/leak.
Getting lost, yep can go up high but at least you know it can't go to far tho removal is a bit trickier than normal.
Sports,i scuba dive in mine, have been to 28metres with no problems, it was blessing as white tipped reef sharks were about at the time.
Have flown also long haul and a much more pleasent flight than previously.
Allergy/cystitis, i react to the creams for cap but not had a issue with this at all, have used for 12 days straight.