They are breeding.. now his and hers.
Both schwinns, kinda entry level, 250 watt rear hub motors, 36 volt batteries. Mechanical disk brakes, front suspension and suspension seat posts, comfy seats,high handlebars for a reasonable riding position. Weight and aerodynamics are not as much of an issue with "magic pedals". My bike has front and rear derailleurs, hers; rear only. Rear gears only with a wide range gear set is prolly enough. The size/ratio difference between 1st and 8th gear is amazing compared to old school gear sets. with battery assist the need for super low gears is greatly reduced.
Both now have fenders, racks, panniers, and lighting.
I did 30 miles in the baraboo bluffs and still had battery for the long final hill to the house. When temps were down in the 30's range was quite a bit less had to pedal the final hill but since I've been biking more, the pedaling wasn't so bad. Range is very dependent on how much your pedaling assists the battery. These are pedal assist only, top motor assist speed is about 20MPH I would say an average speed of 12 to 15 MPH is a reasonable estimate. They are quite a bit heavier than pedal only bikes these weigh about 55lbs.
With pedal assist when you start to pedal it activates the motor, it's a fairly gradual ramp up in power. The handlebar control/display. lets me select 5 levels which basically are the cut off speed for the motor assist. It ranges from about 6MPH up to 20MPH, assist gradually tapers off as you approach the selected top speed. You also go fast as you wish to pedal, 30MPH down our hills is pretty common. About half the time no motor assist is needed if the rider is contributing some pedal power. Rear hub drive is not as versatile as the more expensive mid drives, which pull through the same chain as the pedals, so benefits from your gear selection. Most rear hub motors are single speed. These motors do not have regeneration ( battery charging as a brake force) this is usually not a significant amount of regained energy so prolly not a big deal to have. So these run the gamut from what we have to near motorcycles with liter class acceleration and top speed. You may want to check the local laws. The legal classes by power and assist mode open and close places you can ride. There will be a lot of change coming in the bike laws cuz the hot rodders are going to get into crashes and violate speed laws. Naturally the gummerment will want to get tax revenue out of them.
The field is rapidly changing innovation is going on everywhere. Battery life is a concern, how you handle battery charge states helps life Hot is hard on batteries and cold saps range. City, touring and mountain/trail/fat tire are the three main classes. As usual I started conservative to get some seat time in then may upgrade as I understand the choices better. Always easy to find buyers for entry level equipment, IMHO expensive bikes will depreciate rapidly as technology changes.
Theft is/will be a big issue, they are small portable and expensive, batteries are really high buck brick size theft targets.
Whoosh if you need more info ask away but I'm just a newby!