My dads got one, they seem good value. I’d go with a Boosted Rev myself but it’s considerably more expensive. In London I see people all the time. You may get stopped and the police in London have done a couple of targeted stops in places like London Bridge but generally if you’re riding safely I imagine they have more important things to worry about. I’ve got a Boosted Mini X but have limited mileage so far, it’s a fair weather toy.