Took delivery of my first cargo bike this weekend, a Bike Friday Haul-a-Day that I purchased through their kickstarter fundraiser last fall.
The bike's frame is made out of three subsections that bolt together. The entire bike shipped in a 45 lb box the size of a large suitcase. Bolt the three subsections together, mount the wheels, and it's ready to ride.
Took it on its maiden ride to pick up take-out, and 150 lbs of humans wanted to come along. It's amazing how stably it rides with the low cargo deck, afforded by the 20" wheels.
I'm a former Bike Friday owner, so I already knew I liked their bikes. I wondered long ago when they'd venture into cargo-bike territory, and always thought their 20" design expertise would be a great starting point for designing a cargo bike. I had their family tandem, and marveled at the stability and ease of balancing with a large load, even at ridiculously low speeds. I guess it's a combination of low center of gravity and low trail front-end geometry that make it very easy to stay upright and keep the steering light.
I can't say I'm a fan of their front rack platform design, as it seems like it would have a large lever effect on the head tube, but then again Bike Friday have never specialized in front loads, and I don't intend to put more than 10-15 lb in a Wald basket mounted to the platform. All serious loads will go in back.
Just have to build a dynamo wheel for lighting, and add fenders.