I bought a brand name ebike at a local bike shop. My next bike was a Direct to Consumer ebike. Even name brand manufacturers use brand name mid drives, they still have no spare parts once the ebike is out of production. I'd look at mid tiered ebikes. Like Aventon, Blix, Rad Power they have good reputation and you get a great value ebike. Hub drives have been in production a lot longer than mid drives. People always complain about non top of the line derailer systems by Shimano. From my experience, you don't need top of the line shifting on an ebike where the electronics does most of the work, weight is not an issue and these derailer systems are proven. Whether you buy a 4-runner or a corolla its the same a Toyota. The same is true of Shimano. The fastest growing ebike market segment is Direct to Consumer. You can get your ebike serviced at a local bicycle shop or mobile bike repair business if you can't do your own service. Good luck