I got this chain and the 16" 4mm chain at the same time.  This one is not as nice as the other, I don't know whether it is the extra millimeter or whether they are different manufacturers.  Whereas the 16" chain was stunning this one is merely serviceable.  Perfectly useful as a base for a nice slide or pendant but won't get noticed for it's own beauty.

It seems well made and substantial.  It's a wardrobe basic.  However if I were buying it for myself I would order another one of the 16" chains and get a silver extender.

If you are looking for something that can support itself as a unique piece of jewelry this isn't it.  On the other hand, if you are looking to support a heavy slide or pendant without detracting from their appearance this will certainly do the job quite nicely.