Over a couple year's time, I bought the entire Gerbing setup - jacket liner, pants, gloves, socks, and the controller.
Info and opinions:
Our alternators put out 27 amps. My entire outfit listed above requires 15-16 of those. I never had a battery problem but others have when riding in city traffic situations - light to light. You have to get above 2000 rpm's or better to make enough juice to keep the battery up.
I have never had to turn the heat controller beyond halfway even when riding in near freezing temps. The cycling of the solid-state heat controller will make your lights "flicker" as it cycles on and off. This is a little aggravating at night...
I originally bought glove liners instead of gloves. Then I bought the standard gloves. I would recommend getting a gauntlet style glove. The wind can steal the heat as fast as the clothing makes it, so blocking the wind with chaps or a rainsuit will help keep you warmer. A good windproof jacket is essential.
After using this stuff, I have found that I don't use the socks anymore. Keeping the legs and the core warm is usually enough.
Hooking all of this stuff together can be a pain, but being able to ride without freezing makes it worthwhile.
I would also recommend installing the Triumph (or some other brand) accessory socket for ease of use. But you may want to rewire it to the battery with an inline fuse as the stock harness for it goes to a 10 amp fuse in the box. #3 if I remember correctly.
