@mattgrayyes I'm having two bikes with a Mahle X20 motor in it. This is a rear motor solution, which means that most components are just like with any "normal" bike. Exchanging both tires is just like with any "normal" bike. Also you can easily exchange the chain and the gears and this whole stuff. The motor is often used in carbon bikes, so they are really light - and the motor is really light as well.
The control is a single button. But you can buy a display and you can connect your phone to the bike as well - but you don't need to.
I'm not sure where you live and If Mahle is available at your place.