None of these are true for me. All people I've used it with spoke positively about it. As for flexibility, yes a bit. I'm more concerned about rotational capabilities. I wish there was some way to lock it in place rather than having it swing side to side. The flexibilty I can deal with, the rotational I can't as much. It still isn't terrible though. And over all, on my computer it is rather good.
Ah, yes the swivel does get annoying. A locking mechanism would have been a good idea, I think, but then it would incompatible with other headphones such as the M-80.