The only issue is that it doesn't sound like their battery technology is all that great. The mentioned the scooter can only get 60 miles on a full charge - meanwhile, a Tesla can get over 200 and should consume a lot more energy than a smaller scooter.
With so much of their idea riding on the battery itself (and not the scooter), they're going to need an awesome battery. If they have to use someone else's battery technology, I don't think it will work out that well for them, as a company.
As an idea, it's great. As a company, they've got work to do in the department of developing a better battery.