I believe it's better to pick a folder that best fits your personal needs. I started out looking at the brompton/dahon (just because they seem to be the most popular), but, after reading all the positives and negatives, I went with a larger folder that wasn't even on my list to start with. I picked the Montague XO. (A higher end Paratrooper)

Full size bike, that folds small enough to fit in the trunk of my car with room to spare. And I drive a Prius. If you are riding local transport, this bike would be bulky to lug around, but I'm not. It fits my needs perfectly.