The Curl D9 is an interesting design. In another time, I would have considered it.
This is Dahon's version of the Brompton and Dahon somehow managed to give it a "Hunchback of Notre Dame" look to it.
Disk Brakes, good deal.
But what's with that derailleur?!
Guess you need extra things sticking out to grab onto random obstacles and objects.

Overall, looks like Dahon added more innovation into one or 2 years of the Curl than Brompton has in 50 years.