Cargo Bikes

I agree about the flexiness of the christiania, though it does handle much better when you've got some decent weight in the front. I've heard that the opposite is true for the two wheeled cargo bikes.

Not true. Both the Bullitt & the 8 Freight are fine under loads, and in fact the 8 Freight seems to handle better with a big load on.

The early versions of the Christiania had tendency to speed wobble.