Thinking of switching from Mirena to Paraguard

Has anyone made the switch? I have had the Mirena for about four years. Although for the first year I had some pretty intense cramps, my body seems to have adjusted to the Mirena. I get a regular, light flow and some cramping around my period, but nothing too severe. I'm worried about the heavy bleeding and intense cramps that some people experience with the Paraguard. Is there any benefit to have used the Mirena before? Any chance my body will be more receptive to the device?