You're looking at a hub drive bike. Others may disagree, but don't get too caught up in the brands. This is going to be a rather broad assessment of the ebike business as a whole but hub drive bikes pretty much always share similar parts, and are pretty much the same thing no matter who the brand is. For the most part, the different bikes simply come in different shapes with a different set of accessories. The business is very incestuous.
You care about the actual wattage of the hub motor (not so much the peak wattage which is influenced by voltage.) How many volts the bike is, and how many AH (amp hour) the battery is. You want as much as you can get in each category. Higher wattage hub motors will get you to cruising speed quicker. More voltage will also get you there quicker. AH on the battery will determine range. I also recommend hydraulic brakes over mechanical but thats one of those trade offs that make inexpensive bikes cheaper than the next bike.
Service is a bit of a reach IMHO. If something breaks, you can sometimes send it back for a replacement if its under warranty (if you want to torture yourself) and sometimes you can just pick up a replacement part off the internet for usually just a few bucks (batteries are pricey though and that's a whole other subject which requires its own post). The parts will be easy to find because remember, all of the bikes are the same. Others will disagree but I don't put much stock in service as these bikes really are simple to work on.
If you aren't looking to do a lot of hills and the wife isn't particularly heavy, a 250 watt hub motor 32 volt trike with like 13AH batteries probably good for say 20 miles or more are starting at around $600 nowadays. Keep in mind that the bike business as whole is currently imploding so prices are dropping every day at the moment. If you want a trike with more versatility you'll want a 750 watt hub motor, 48 volts and something like a 20AH battery. That will get you up steeper hills without pedaling and take you 30 or 40 miles without worry.
I also recommend a trike with a throttle. If you want to pedal a lot buy a conventional bike.