I know I am a bit late into this thread, but it has been useful. The C380+ is on my shortlist. I am 5'6" and the tall tyres have concerned me. On my current ebike (home built) I needed up switching from the 27.5 that the donor came with and putting 26" wheels on it.
I am thinking of the small mid-step frame. I kid you not, I was on the phone yesterday with a Gazelle salesman and he was recommending the 57. Yes, it was all he had in stock.
My shortlist includes: Priority Current, Serial 1 Speed, and the Gazelle C380+
I have had a belt drive bicycle, converted to a front-driven wheel bike, it is on a long term loan to a family member. It had a VuVinci N360. My current bike has a Nuvinci N380. As you can see, I am pretty sold on the Nuvinci for commuting and want to get back to a belt drive.
Where I am, it is several hundred miles, each way for a test ride. Given 5'6", do you think the 46 mid-Step makes more sense than the 53 mid-step?