Health--so the whole family gets more exercise (we bought four bikes, for two teens and two adults). Reid, above mentioned "the antidepressant effect"--yep, not only do we get more exercise, but we feel great doing it. I think e-bikes are good for both body and spirit.
Transportation--These bikes work as a car replacement for local errands for me and my husband, for my kids to their activities in our town, etc. I use my car less often because I bike to the grocery store, drug store, etc. My daughter has activities all over our town this summer and is biking to all of them. Could we do all of this on our conventional bikes? Well, yeah, but we didn't--we live in a VERY hilly area (carved by glaciers way-back-when), and it's about a 2 mile, mostly downhill ride from our house to even begin getting to most of our activities and errands in our town and beyond. While this is going to be seasonal for us, for the 6 months of the year with decent light and weather, e-bikes are great transportation for our family. My husband and I also are commuting to work (25-30 mile round trips). Commuting time is the same as previous commuting method of car+bus.
Fun--My son read the initial post and said, "He forgot that to say that they are AWESOME!" That's the fun factor.
I should call this category
AWESOMENESS, I suppose! All four of us are having a great time on our e-bikes. It's fun to go everywhere and anywhere.
Finances--Um, no. The bikes were quite expensive. My son says, "But, worth it." I agree. Savings might be related to HEALTH, as we use our bodies more and then that saves us aches and pains and keeps us healthier. Savings also would relate to using our cars less, so not needing to buy gas. We'll see how long the batteries last--that's an expensive component. And, we will need to, I assume, get an annual tune-up for our bikes to keep them running well.
Convenience was mentioned--The main convenience is that work (errands, commuting, getting places) and fun and exercise are now combined. That is super convenient! The main inconvenience is that there need to be more bike racks everywhere, of designs that are friendly for the somewhat fatter wheels of today's hybrid bicycles (lots of racks are made for racing wheels, it seems!)
Environment--this was not my reason for purchasing, but certainly each time we leave cars at home and bike instead, that's good for the environment.
Thanks for an interesting topic!