I have owned/used an ECWCS parka since about 1988. Mine was issued, gen 1 made of genuine Gore-Tex. To my recollection, the genII model (genuine issue) was never made in Woodland pattern. The USMC digital Woodland is genII and the US Army's gen II is ACU pattern.
Now, there are plenty of copies about that come in various patterns and I cannot say that they are good or bad but they certainly are cheaper, by less than half in fact. I have seen a gen II in the Multicam pattern, which is excellent camoflauge, but I did not ask the wearer if he'd had it in the wet. Some if not most of these ECWCS "type" parkas do not have taped seams and although some non-Gore-Tex waterproff/breathable coatings are very good, I am not sure about the ECWCS clones fabrics.
A couple of things about the parka that I like are the pockets, large hood and numerous features designed to keep the weather off the wearer. Very well designed. What I do not particularly like is the weight, it's quite heavy, and the lining seems to "grow" over time and look saggy. It is also bulky to pack. I do not use it often anymore.
If you look about on eBay you can find genuine Gore-Tex ECWCS in Woodland or 3-color desert pattern for fairly cheap. Since the woodlland and desert have been replaced for official wear by the ACU pattern. The Gore-Tex are only Gen 1, which means the hood is not stashed in the collar and the lower pockets are different design. You can find Gore-Tex in digital woodland (USMC) that are genII but they are usually priced high.
