The EVT scooters were great -- in 2003. However, that is a very long time ago. The newest electric scooters are much better in design and execution.
Imo electric scooters have many advantages over electric bikes, but finding a competent and honest retailer is the usual challenge for consumers.
My friends from Taiwan sent me articles and posts alleging that the EVT scooters were just a scam to milk government subsidies that were being given out at the time.
I would suggest that you do not buy a used EVT scooter either -- they have numerous issues, see Yahoo Groups, etc.