I forgot to add that one annoying thing is vibration of the drivers or casing when walking. You can definitely hear yourself walking with these (in between tracks mostly), and I don't mean your actual footsteps. I am unsure why this is. Perhaps the diaphragm is resonating, or maybe the earcup...

I just purchased a pair of the un-foldable ones off e-bay. Interestingly no "metal" trim on my ones, so jet back. Yes I expect them to snap. But I will just buy another pair. The sound, as indicated by others, is very good. Smooth, laid back, not too closed in, no obvious holes in the midrange...