I have a Gerbing and a KLAN jacket. Klan is a name used be Giali (put Klan Heated Jacket into google) I dont know if they sell them in the states.
Comparison - The Gerbing is hotter - sometimes need to turn it off - but it is a looser fit than the Klan. The material is sythetic, and the wiring can be felt throught the shoulders, although it is not uncomforatble to wear. The heated collar is nice, but the arms are too loose - the wind from around the side of the fairing blows the heat away before it warms me up. Better than not having it at all, but end result is warm body, cool arms. To compensate for this, if its really cold, I wear a fleece on top of the heated jacket, to keep the heating elements close to the skin - but then I have to turn it off every now and then.
Tha Klan is not as hot, but they seem to have done more research about the amount of heat needed. It stays on and does its job. No need for a switch here. It keeps you warm. The material is fleece with a lining, and the wiring is much neater. It doesn't get in the way, and it looks more like an ordinary jacket than the Gerbing. The arms are close enough to get the heat where it is needed. No need for another jacket to keep it close to the skin.
I only bought the Gerbing becasue of a temporary lack of supply of the Klan jackets. Ive sinc ebought the Klan. Still have both, still use both (when my wife pinches the Klan and I have to wear the Gerbing), but in my opinion, the Klan is nicer.