They are not meant to be warm gear, but to be a 'tactical softshell' layer. However they are excellent at breaking the wind and repelling water. Today I shot a match in north texas. It was freezing when we woke up and we had 20-25 mph winds all day. I wore a stealth hoodie along with 3 layers (underarmor, wool, fleece) and I was nice and warm all day. Breaking the wind was the biggest advantage. I've worn it in downpours as well and it is excellent.
I wear an explorer on duty when it's cool out and it functions more as a specialized windbreaker, but also does really well in the rain and snow.
Give the TAD guys a call if you want more info. They are a great bunch of people and can answer a lot more questions. Be careful though .... you don't usually end up owning just one.
Doc