I have the jacket. I had the half zip and sold it for the full zip. If I had it to do over again I'd keep the half zip, it was warmer I think. They are pretty warm and very well made and durable. I think my Kuiu Superdown Pro is warmer, but it's not nearly as durable. The Kuiu packs down much better than the Kifaru.
For my needs I'll use the Kuiu a lot more on my western hunts. The Kifaru will go to AK more, it was perfect for my moose hunt. I'll also use it more around home when day hunting.
Hope that helps. I have the Superdown Pro pants but not the Kifaru pants so I can't compare there.