My wife and I have four electric bikes and have put literally thousands of miles on them in the past few years. Our goal each year is 2000 miles. We have them because, at 80* years of age, we cannot pedal the normal bike like we used to and the electric takes about half the load off.
Some comments:
electric bikes are much heavier than non-electric
You should have a local dealer that can work on them.
Mine's a center mount and DW has a rear hub motor.
Pedal assist requires the pedals to be rotated to turn on the motor
Cruise allows the motor to run without pedaling. Handy at the end of the day.
Lithium ion batteries are better than wet cell.
Many e-bikes are pegged at 20 mph. Plenty fast for us seniors.