Not a long review. This jacket liner is much better. instead of a heating element looped throughout, the microwire is more of a uniform distribution. The HUGE plus is that the front of your arms on the sleeves are now covered. The "sheets of heat" warm up quick as well. Also,the collar is bigger which I thought would be a terrible nuisance. I wore it this morning with my aerostitch and was fine around the neck with my chinstrap fastened. no more of that single hot wire branding you.
If you were contemplating a new gerbing liner, go find the 200 smackers somewhere and buy it.