I don’t know why I’ve never tried one before! I’ve just had my most comfortable period in years; no soreness from tampons, no leakage and no running out of tampons halfway through the day. It’s easy to put in and remove and easy to clean.
The only cons I can think of are that it makes a bit of a suction noise on removal and it can be a pickle to clean in cubicled toilets.
Sorry for the TMI but honestly I couldn’t recommend it more!