Poor customer service. Won't honour warranty.
I have had my the z20 plus 1000w for roughly 11 months now. The battery is either faulty or very poorly built as I now only get roughly 15 miles from a full charge using pedal assist (was 30-35 when new). Customer service reply once a day if I'm lucky. they are trying to play it off as normal degradation and not honour the warranty. Save your money people. Hopefully my credit card company get mine back for me.