I've got a bike friday, and while the frame is stiff as hell, the steering mast is pretty flexy. That makes for a comfy ride on 20" tires, but it doesn't feel stiff.
After a couple folds now, I can get the friday crazy small in about 2-3 minutes- front wheel off, pop the steering mast off, fold the seat mast, fold the rear triangle, done. It doesn't take a lot of room in the trunk. Figure 5-7 minutes from bike to trunk to bike.
I will say that a bottle cage on top of the beam tends to mess everything up. I've since taken it off. I've not had chain dropping problems- so far, it's mostly stayed on, but it can come off.
Mine was cheap- got it used. After selling off the parts I didn't want and supplementing with ebay and my own parts bin, it came out about the same price as a swift.