In our case, bikes in daily use are wheeled into a ground level store room and parked beside multiple power points.
On the other hand, on a tour, staying at bed and breakfasts, or living in a flat, or anywhere which makes bike entry impossible, it is essential to be able to remove the battery for overnight charging.
I was quite attracted to the Technium at the Wiggle price, but this charging aspect, plus the fact that we are all used to throttle plus pedelec hub motors, make me wonder if a purchase would be sensible. I suspect getting used to the pedal pressure motor power control could be difficult, and I also see that power falls off between 10 and 15 mph. That is an area in which, having cruised along with the pedelec at say 10 to 12 mph, I like to have instant acceleration to 15 mph available from the throttle, for example, in a quickly developing difficult traffic situation, where I want to get or keep ahead of the motorised mob.