It was a great ride. The seat was more comfortable than I expected, although I suspect I'll still replace it at some point. The pedal assist and throttle control are amazing; way better than the Ion.
I agreed to the swap and they got it ready for me while I waited and enjoyed a coffee.
When I was riding it home, I had some trouble changing gears. The shifter was hitting the throttle control. I had to really force it to shift down. Once I was home, I had a closer look at it. Surely, this wasn't the way it was designed? They had told me at the shop that they tuned it up, and replaced the grips, so I'm guessing parts were removed and put back on and somehow this was overlooked. Anyway, I swapped the order of the brake lever and gear shifter on the handle bar, which made more space for the shifter and that fixed it. I haven't taken it for a test ride, but I'm confident that'll do it.
I also moved my carrier rack from the Allegro to the Neo Carbon without a hitch. The flat carbon look of the rack really goes well with the bike. :)