cat0020 - those scooters are probably are little bit less fuel efficient. I was pointing out that they get very good mpg that is comparable to open scooters, and since enclosure makes them more practical for commuting it would be a reasonable trade off.
In North East, if I have to choose between: enclosed car@45mpg and open scooter@100 mpg, I'd use the car 70% of the time, and the scooter when it's sunny and not too hot/not too cold.
Enclosed scooter, if done right, could replace the car.
As far as 2 wheel vs 3: three wheeled scooter is self-balancing and unlike 2-wheeled version, will not tip over at low speeds and at stops lights, so it's a trade-off between operating costs vs convenience. I want to see how this scooters stack up against other transportation options, but if it's a small premium over 2-wheeled version (say 10-15%), I'd go for it.
Three wheelers with two tires on the rear axle are not going to handle anywhere near a 2 wheeler while cornering....but...as long as you realize that they seem to be a way to save a bunch of fuel for people. Even the MP3's from Piaggio with two independently sprung front wheels have some cornering issues on tighter corners at medium speeds...you just have to adjust driving styles.
2006 Jeep Liberty CRD...Founder of L.O.S.T.
OME 2.25" Lift w/ Toyo Open Country HTs 235/75/16s
ASFIR Alum Eng/Tranny/Transfercase/Fuel Skids
2002 Air Box Mod...Air Tabs (5) on Roof...(3)each behind rear windows
Partial Grill Block with Custom Air Scoop and 3" Open Catback Exhaust
Lambretta UNO150cc 4 Stroke Scooter