I hope they can be successful, I really think they could have a Tesla like impact. Of course they're not for everyone, but I think they'd be great for a lot of people. Plenty of people have long commutes that this would be great for (where they could have this and also afford another vehicle for other uses for when they need more room, more comfort, etc). I also think it'd make for a great first car for teenagers (cheap, not terribly fast, economic, room for 2, and it'll teach them that if they want a nice car then they should work to earn it).
There's also a little electric kit car that is really interesting too. I always forget the name, but it's very narrow and also not real long (it's like half a Smart car), but it has a full race spec roll cage, and because of the heavy batteries being on the bottom it actually has a really low center of gravity (it also weighs a lot, it's like 3000lbs). But you could actually feasibly do lane splitting like motorcycles in it (not sure if it's legal to do it in that though). I forget how much it costs though (I believe the kit is reasonably cheap like ~10k, but you have to either source your own electric motor to put in it, or I believe they'll sell you a finished car for like ~30k?).
Seems pretty impractical.
And, might as well buy a Cooper or Fiat.
Those cost like 3-4 times the price and have much worse fuel economy (for how small those cars are they really are not that fuel efficient, same as the Smart cars. Sure they should be nicer cars but they're quite different.
Yes this is basically a single person vehicle (where you could squeeze in a second in a pinch), and this is largely a commuter vehicle enabling both a cheap price and should hopefully be very cheap to run/maintain.