I like the idea of the Swift Folder.
I don't. It does pack very compactly, and looks light, but it takes 3 minutes to put together! Who wants to spend 3 minutes in the rain on a sidewalk fiddling with tools and little bitty parts scattering around? To me the Swift looks like part of the "sporting goods" collection of dusty objects at the back of a suburban garage.
Brompton folds and unfolds in 10 seconds, no tools, no loose parts and it's a real bike people tour and commute daily for decades.
https://www.youtube.com/watch?v=pd9opEICGgQ
If anyone can make a solid bike that's lighter, more compact than Brompton but folds just as fast I'd be very interested. It kills my elbow to lug it around and it's still pretty bulky on a bus.
jpgey, how long does the Trail Viper take to fold?