I have a Riese&Müller Vario Swing. I wanted something to transport bigger loads, but also still a bike. So I got a Citybike with a trailer.
The thing is a year old now, and I've used it much more than just for shopping. In the height of summer, I also use it for commuting (without trailer), because I wouldn't make it home otherwise in the afternoon heat. And whenever I go somewhere I have to be presentable, it's still better than public transport.
It doesn't need much maintenance apart from what every bike needs, the belt is even easier than a chain, and the battery gets me quite far.
I also have "normal" trekking bike. And I think if I buy another ebike, it would not be a citybike again. The low access is nice, but the seating position is not for longer trips.