That's great (apart from the charging time), but it occurs to me that there's a problem I've not seen mentioned:
I'm no particular fan of the A2, A1, A bike licensing system, but I can understand the need for it, to stop new riders going out on machines that are too powerful for their skills and then finding out the hard way that they're not Valentino Rossi when they slam it into a tree.
With electric bikes, however, *all* machines will have the capability of the ridiculous acceleration that the one in the article demonstrates, so there will be no progression of 125, 600, 1000 for example.
Now, yes, you coud electronically "throttle" and limit the power to stop this, but I have little doubt that within a few weeks of these sorts of bike becoming mass market available at prices that people can afford, there will be aftermarket kits on eBay and Amazon allowing you to re-flash the system or simply bypass the restrictions and there's going to be a spate of young riders being scraped off the road and new calls for these "lethal machines" to be taken off the road.
I really don't know what can be done about this, because any restriction can be bypassed if you want to