I received the Theorem Jacket for Christmas. It's actually pretty decent. I haven't had any issues with it yet, I've used it for the extra cold days on the mountain and with a thermal pro fleece have found it to be very comfy. I've also used it just for normal cold days when I don't feel like layering a fleece and a shell. I normally use a TNF Mountain Light for skiing and find that it is more breathable (and versatile), but for the days where I would prefer some extra insulation, it's great (plus, it's got pit zips). As far as EMS products go, their warranty is awesome. If you have any problems whatsoever, just bring it back to the store and they'll give you a replacement no questions asked. In the past I have found that their "System Three", is just as good as normal Gore-Tex, so long as you maintain it with proper washing and renewal spray. The waterproofing is pretty solid but it does lack a noticeable amount of breathability compared to Gore-Tex XCR.