I purchased the HD (Gerbing) jacket liner, pants liner, gloves and insoles. They work great. The jacket liner and gloves are very easy to use. The pants liner, if you wear them over your jeans, makes you look like your wearing pajamas, they would be a pain in the ass to wear under your jeans.
I would recommend the Gerbing Extreme Element line of heated gear. They are waterproof, so they will also be your rain gear and are designed to be your exterior clothing layer. I think they would be much easier to use than what I have and save you from packing heated gear and rain gear.
I know that Gerbing is moving from Washington to North Carolina and were not going to have their production up and running until this summer. That's what they told me in December when I called them.
Cowboy