Well... I've ordered their dancongs myself, and their aged Anxi oolongs.
In my experience they reply quickly to emails, cheap and fast shipping.. Their teas come in foilbags, the teapackages that I got weren't very well heatsealed though, unfortunately.
As for the teas themselves, I don't drink dancongs myself.. but the wifey assures me that they were quite good for the price, she especially enjoyed the Gardenia one. And I rather enjoyed their aged Anxi's.
Just thought I'd post a thread about JK Tea Shop here, because I couldn't find a thread about them with the search feature.