I've got a Goretex LL Bean Stowaway hooded parka. In the morning I put it on over my suit and tie and ride to work. Perfect comfort down to 0F, and vastly more convenient than driving in DC traffic. If I start to get warm, I unzip. It cost $169, which is chump change. I'd consider it a perfect piece of commuter wear.

Whether or not it would be suitable for hard work in a rainy foreast is another matter. I suspect that it would not. That is because it is not great in the rain (although not nearly as hot as a waterproof raincoat).

I'd say how good it is depends upon the use. It is really good for some things.

Paul