Just me, but I think the handlepost and stem design is silly, and heavy. Note that the bottom stem projects far forward, then the top stem is tilted back, to put the handlebars almost directly above the top of the fork steer tube. That's the long way around (with more weight) to achieve the same result as a typical bifold (Dahon, Zizzo, et al) handlepost that just goes vertical from the steer tube (direct path) for the same result. Bike Friday uses a long post tilted aft in line with the steer tube, then attaches a typical stem on top to put the handlebars more forward, again, same result. The BF has the advantage to adjust stem reach and can mount a suspension stem, but the further aft handlepost is easier to hit with your knees when climbing standing.

The Mezzo design also makes the handlepost telescoping part parallel with the seatpost, so effective top tube length stays same as both go up. With the typical bifold design like Dahon and Zizzo, the seatpost and handlepost diverge, so as both go up for height, the effective top tube length increases accordingly, proportional to rider height.