I test rode a MP3 250 when I was shopping for a scooter.
I don’t particularly see much advantage over regular two-wheel scooters. MP3 weighs significantly more, cost more when you need to replace tires, brake pads and suspension. No advantage to fuel economy, even conpared to similar displacement motorcycles. Niche product, yes.. handles that much better than a 250cc two-wheel scooter? debatable.