Has anyone in 6x6 World ever used on of these?

Thunder PowerJet Performance Carburetor Clutching Snowmobile Motorcycle ATV Improved Fuel Efficiency

A buddy of mine who has been into snowmobiles forever told me about them and said a snowmobile engine that would be used in many different temps. (aatv's) would benifit from them. Makes it easier to tune: warmer or cooler, and different elevations for that matter. Makes sense. Just curious if any of you have any REAL expirence with one?