I'm a satisfied user of Moon Cup (available at least in New Zealand and the UK) of about three years, I'm very proud of the change as it makes a great difference in producing unnecessary waste that's difficult to get rid of!
I'd recommend the Cup to anyone, it really is very easy and hygienic to use.
The idea might seem a bit funny at first, but thinking about it, it's one of the most natural things for a woman to do!