I have the Mirena coil!
A big benefit of it for me is that I literally have not had a period since,
BUT I do get period-like cramping every few weeks, even though it’s been 10 months since I had it put in, and the cramping is INTENSE. Like really really bad, have to do deep breathing and curl up for a while, and this isn’t something I ever ever experienced before getting it put in.
Also, doctors tell you that you won’t have any mood-related effects, because the “hormones are localised” - but this actually isn’t true. Myself and loads of friends who have the Mirena definitely suffer from mood swings, low mood, anger etc etc that we definitely believe are related to our coils, as we just all feel a little different to how we did before. So yeah if you’re sensitive to hormones be mindful of that!!
EDIT: Don’t know if anyone else had this with Mirena but my sex drive is now next to nothing. I don’t want it at all, and my libido hasn’t gone back to normal since