I have one and love it. I’ve used the same one since 2009. I bought a replacement because I thought I lost my original one, and then found my original one!
There is a learning curve, and certain shapes work better for certain people.
I have a Mooncup (UK variety as I bought it when I was overseas) and it works great for me. I have to empty it 2-3 times on the first heavy day of my period, and than can get away with once or twice per day after that. The best place to deal with it is in the shower.
If you try it and you look like you murdered someone, that’s normal. Again, learning curve.
I empty it in public restrooms without easy sink access without issue. I just wipe it off with a paper towel and/or toilet paper, and shove it back in.
I boil it before the start of each cycle but don’t wash it during the cycle. Up to you and your comfort level re: bacteria risk if you wash more, but definitely sanitize it before each cycle.