There was a thread not too long ago on it. Search appears to be busted, but it's probably only a few pages back.

The pros that I see are fast tires and TT bars, which look interesting but are rarely used on anything except fixies / SS / tri bikes. Dahon's fold is pretty good, better than BF and Swift imo. I also think it aesthetically it looks sweet.

The cons are that design-wise, the bike can't make up its mind. Suspension on the front wheel? An internal hub? Minimal handlebar height adjustment? Steel frame? All seem like strange choices for a modern road bike.

Also, it's got the i-Beam, so saddle choices are limited, unless you change seatposts. Other parts (like the derailleur) ought to be standard but I'd check on it first.

I'd also assume / have been told that, like most Dahons it's inadvisable to pull back on the handlebars, as it has lots of flex.

My guess is that the Speed Pro will fold better than, but perform as well as, a basic Swift or BF. Once you go above that level, you're paying more for things like drop bars, more gears, custom fit, lighter and more robust components etc., but the basic functionality doesn't change all that much. With new folders, once you're over $800, I think you are in the Land of Diminishing Returns....