I guess it all depends on how one rides. I ride for fun, exercise, pleasure, etc. So I haven't noticed any of the issues that some of you folks that don't like Bromptons notice. I find it a great bike and easy to ride 20-30 miles. Everything just works the way it's supposed to. What do the Brits say? Horses for courses. If you're a young guy and ride hard maybe they aren't good bikes for that but Bromptons have toured the world and probably far more than any other folder.
I didn't find a folder that came close that fit me so well or rode as smoothly as my Brompton.