Have any of you ladies out there ever used a menstrual cup?

I just stumbled upon a site about menstrual cups yesterday (http://community.livejournal.com/menstrual_cups) I had never heard anything about them before, but I’ve been reading and I’m probably going to order one and I already know which would be best just from reading. I was just wondering if anyone here has experience, and what kind of cup they use.

Also, for you chicas out there who have never heard/used one, I suggest you read the link I posted. Totally awesome.