Nice bike and good to see a smaller player with another bike option. The o.nly thing I would have to do, is put a drain hole in the bucket of a battery connection holder.
Hearing bad things about the new Whyte e180's having problems with shock damage, census is frame flex causing shockshaft seal...
Just changed from a Giant with a Yamaha motor to a Cube with the Bosch Gen 4 motor.
Both used at Bike Park Wales, as it's local.
The Yamaha has a very natural feel to the assist levels, only problem I had in the two years was condensation in the display .
The Bosch has 5Nm less power, but feels...
The sync drive has about 1mm side float on the cranks. Plus it can knock when starting to pedal as the drive pawls engage.
Remove the chain and rotate cranks slowly, they should be silky smooth.
Make sure you hold the crank arm, otherwise rough pedal bearings will give you heart failure ;)