Just read this and think I'm going to go for a Mooncup too. I keep meaning to get one, but I just keep forgetting to order it. The AF comes along and it reminds`me!!
I'm definitely going to get one though. I think I remember seeing that if you bought it from Mooncup direct on their website, they gave you 3 months to try it and would give your money back if you didn't get on with it. Seems like a good idea. Can't remember where that was though.
If I find it, I'll post the link.