I got my c11 pro not so long ago and I like it a lot. Great bike for commuting.
But my main complaint is the battery life. They claim 104 km range, but I know that it won't be the case, so I expected 70km at least. Nope, my battery life is terrible, I only got around 35-40km per charge. I believe my battery is faulty.
I have contacted Fiido support, unhelpful. If they are not replying within the next few days, I am considering to find a way to return the bike, which is sad because I really like it.