New to shot shell reloading.

[Allen]

I am looking to start reloading shot shells. I don't know anything about the re-loaders used for shot shells. I have been looking at the MEC line. Some of their models have a re-sizer built in and some don't.

How important is a re-sizer for shotguns? Has anyone ever used the MEC line and what are the pros and cons.

If you use something else, what do you use and why do you like it?

Thanks
Allen