I have the idi suit. well the jacket and the ice armor bibs. The jacket is great except for one thing which is pretty important. The suit does NOT breathe well. I have to take it off when doing anything active on the ice. (early ice drilling by hand, or hauling the gas auger around) the sweat breathes through my clothes and gets stuck on the inside of the jacket, on really cold days it turns to frost. The benefit of the ice armor extreme is the liner. Sweat will breathe through the liner to the inside of the jacket, thus not freezing, or if it does, not affecting you at all. I def like the jacket, but would have bought an ice armor jacket instead if they sold them seperatly.
Good luck, there are a couple other companies making suits this year too, check out reeds sporting goods.
E