Mirena stopping your period?

Alice

I am getting the mirena iud to reduce my period flow and cramps, I have horrible periods that make me iron deficient, throw up from cramps and make me faint, for the people who have had the mirena for a while (not just inserted but after your period adjusts) have your periods stopped or been lighter? Is cramping better? The only reason I am getting a iud is just for period relief.