I have only used this for one cycle and to begin with I was worried it wasn't working for me as all of the reviews I had read said you can't feel it but I could! However, once I trimmed the stem there was no looking back. It can stay in for up to 12 hours, is safe and I just love that it means no waste. I quickly got the hang of inserting and removing the cup. I highly recommend making the move to a menstrual cup.
Using this cup is one of the best decisions I've made. It's so much more convenient than tampons or pads (not to mention waaaay more environmentally friendly) and it is a safe option for sleeping overnight; no risk of toxic shock syndrome. It's easy to use, easy to clean and so much cheaper in the long run. Yes, it takes a little while to get used to inserting and removing it, but once you get the hang of it, it's a breeze.