I also have the 550 version (bought before I had the 650). I didn't love it, I thought it was requiring most of the force because it was pushing a great deal of pilot up into the pocket that needed to be extracted. So I chucked it in my drill press and tweaked it with small files and scotch brite and it requires a lot less force and seems to still accept the primers (I only did a few) OK. But then I tweaked my SuperSwage to be a lot faster and I will probably just use it.
If anybody wants a try/buy on my Swageit please PM me, I am a motivated seller. The punches are available separately if you would want to restore it to the original shape.