Menstrual Cup- yay or nay??

I've recently been floating the idea of buying a menstrual cup. It would be a lot cheaper- I'm not swimming in money these days, and it's better for the environment. I have a heavy flow the first few days then it lightens up. I'm not afraid of blood, or grossed out by the idea of using a cup, but I wanted to hear other people's opinions. Is getting a menstrual cup worth it? Has anyone had good or bad experience with one?