I use them sometimes and have had no problems with them. They're solid and not "floppy." What specifically did you want to know?
[modified later to add] I can no longer say that I've had no problems with them; the last time I tried to use them in a live recording, one of the swivels didn't pass a signal until I flexed it, and since then it's been intermittent--when set to some angles it seems OK, while at other angles it again doesn't pass a signal.