I own BIONX 350 and no problems so far.
Just like with any Lithium battery do not use all the way until cut off, because it shorten battery life.
My BIONX delivers incredible range bearly sipping Watthours from battery.
It is edrive designed to Western standards, example fail-safe system which cannot be burned, overloaded, overcurrant, overvoltage, overtemperature protections .
Most off all BIONX uses REAL battery SOC meter not a useless 3-light throttle toy like cheap crap.
You dont have all this protections on cheap eBay ebike kits.
Of course BIONX costs money,
you get what you pay for.
You need reliable commuter?
I commute on my ebikes /summer and winter ones/ 300 days in a year in a minimum.
Reliability is number one if you serious ebike commuter.
And reliability = $$
$4000 can buy you reliability on build ,ready to ride ebike, just read reviews,
Stromer if you prefer hub or BOSH/YAMAHA if you prefer middrive.
Last edited by powell; 03-05-16 at 11:18 AM.