Okay! So I'm on my second period with my cup and at risk of sounding like an infomercial, I'd just like so say I love this thing! Mine is a divacup - I won't post a link because then I'll really look like a spammer, but that should get you a good result in a search engine.
This thing is amazing. I don't smell like a period. I don't leak into my underwear. I don't have to use pads (I abandoned those years ago anyway!) and now I don't even need tampons... which can be very painful to remove, agree? Plus there's the risk of tss...
I think the best thing for me is how convenient it is. You only have to clean it out twice a day: when you wake up, and before you go to bed. Unlike tampons or pads, you don't have to carry anything around with you. There are no noisy wrappers, and - even better! - no wrapped up tell-tale residue in the waste basket.
Along the waste part, you're not contributing to the heaps of trash around the world! This is a waste-free menstrual option. You rinse out the cup in between insertions, and that's that. Because you only have to do it twice a day at bedtime and as you wake up, you're almost always going to be near your own bathroom, though a public bathroom really doesn't present much of a problem either.
Tampons get squishy and icky and spot unexpectadly; and if your flow changes througout your day as mine does, it can be a pain to try and predict when it's ready to come out. if it's not... ouch! Then you have to shove another one up there.
People might say "eeew, you have to see all that blood..." well, yeah... but it's better looking than how it looks ina tampon or smeared on a pad. You just dump it in the toilet and rinse in the sink.
I've gotten the hang of taking it out and inserting it now. I really love this thing! It's worth the price!