Arrived 2 days after ordered (on a Sunday night). Well packaged and battery includes plastic cover over battery contacts. Charged in my Nikon original charger fine and works on my Nikon D3100. It is also rated as .3Ah more than my Nikon original.
I bought this after losing my Nikon original backup which cost around double this one. Haven't used the battery until it is exhausted yet so cannot say how the charge lasts.